diff --git a/.gitea/workflows/test.yml b/.gitea/workflows/test.yml
index d0f5d0e..20c9639 100644
--- a/.gitea/workflows/test.yml
+++ b/.gitea/workflows/test.yml
@@ -20,8 +20,4 @@ jobs:
     - uses: mlugg/setup-zig@v2
 
     - name: Test
-      run: |
-        zig build test -Dno-example=true
-        zig build test -Dno-example=true --release=fast
-        zig build test -Dno-example=true --release=safe
-        zig build test -Dno-example=true --release=small
+      run: zig build test -Dno-example=true
diff --git a/README.md b/README.md
index 03aa4f8..7d03b29 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ pub fn main() !void {
 
         const allocator = gpa.allocator();
 
-        var module = try spv.Module.init(allocator, @ptrCast(@alignCast(shader_source)));
+        var module = try spv.Module.init(allocator, @ptrCast(@alignCast(shader_source)), .{});
         defer module.deinit(allocator);
 
         var rt = try spv.Runtime.init(allocator, &module);
diff --git a/build.zig b/build.zig
index cb7b0f3..e6057c5 100644
--- a/build.zig
+++ b/build.zig
@@ -4,6 +4,8 @@ pub fn build(b: *std.Build) void {
     const target = b.standardTargetOptions(.{});
     const optimize = b.standardOptimizeOption(.{});
 
+    const use_llvm = b.option(bool, "use-llvm", "use llvm") orelse false;
+
     const mod = b.createModule(.{
         .root_source_file = b.path("src/lib.zig"),
         .target = target,
@@ -22,7 +24,7 @@ pub fn build(b: *std.Build) void {
         .name = "spirv_interpreter",
         .root_module = mod,
         .linkage = .dynamic,
-        //.use_llvm = true,
+        .use_llvm = use_llvm,
     });
     const lib_install = b.addInstallArtifact(lib, .{});
 
@@ -44,6 +46,7 @@ pub fn build(b: *std.Build) void {
                     //.{ .name = "pretty", .module = pretty.module("pretty") },
                 },
             }),
+            .use_llvm = use_llvm,
         });
 
         const example_install = b.addInstallArtifact(example_exe, .{});
@@ -60,6 +63,35 @@ pub fn build(b: *std.Build) void {
         compile_shader_step.dependOn(&compile_shader_cmd.step);
     }
 
+    // Zig sandbox setup
+
+    const sandbox_exe = b.addExecutable(.{
+        .name = "spirv_interpreter_sandbpx",
+        .root_module = b.createModule(.{
+            .root_source_file = b.path("sandbox/main.zig"),
+            .target = target,
+            .optimize = optimize,
+            .imports = &.{
+                .{ .name = "spv", .module = mod },
+                //.{ .name = "pretty", .module = pretty.module("pretty") },
+            },
+        }),
+        .use_llvm = use_llvm,
+    });
+
+    const sandbox_install = b.addInstallArtifact(sandbox_exe, .{});
+    sandbox_install.step.dependOn(&lib_install.step);
+
+    const run_sandbox = b.addRunArtifact(sandbox_exe);
+    run_sandbox.step.dependOn(&sandbox_install.step);
+
+    const run_sandbox_step = b.step("sandbox", "Run the sandbox");
+    run_sandbox_step.dependOn(&run_sandbox.step);
+
+    const compile_shader_cmd = b.addSystemCommand(&[_][]const u8{ "nzslc", "sandbox/shader.nzsl", "--compile=spv,spv-dis", "-o", "sandbox" });
+    const compile_shader_step = b.step("sandbox-shader", "Compiles sandbox's shader (needs nzslc installed)");
+    compile_shader_step.dependOn(&compile_shader_cmd.step);
+
     // Zig unit tests setup
 
     const nzsl = b.lazyDependency("NZSL", .{ .target = target, .optimize = optimize }) orelse return;
diff --git a/sandbox/main.zig b/sandbox/main.zig
new file mode 100644
index 0000000..1f3061e
--- /dev/null
+++ b/sandbox/main.zig
@@ -0,0 +1,25 @@
+const std = @import("std");
+const spv = @import("spv");
+
+const shader_source = @embedFile("shader.spv");
+
+pub fn main() !void {
+    {
+        var gpa: std.heap.DebugAllocator(.{}) = .init;
+        defer _ = gpa.deinit();
+
+        const allocator = gpa.allocator();
+
+        var module = try spv.Module.init(allocator, @ptrCast(@alignCast(shader_source)), .{});
+        defer module.deinit(allocator);
+
+        var rt = try spv.Runtime.init(allocator, &module);
+        defer rt.deinit(allocator);
+
+        try rt.callEntryPoint(allocator, try rt.getEntryPointByName("main"));
+        var output: [4]f32 = undefined;
+        try rt.readOutput(f32, output[0..output.len], try rt.getResultByName("color"));
+        std.log.info("Output: Vec4{any}", .{output});
+    }
+    std.log.info("Successfully executed", .{});
+}
diff --git a/sandbox/shader.nzsl b/sandbox/shader.nzsl
new file mode 100644
index 0000000..cc696f1
--- /dev/null
+++ b/sandbox/shader.nzsl
@@ -0,0 +1,15 @@
+[nzsl_version("1.1")]
+module;
+
+struct FragOut
+{
+	[location(0)] color: vec4[f32]
+}
+
+[entry(frag)]
+fn main() -> FragOut
+{
+	let output: FragOut;
+	output.color = vec4[f32](1.0, 1.0, 1.0, 1.0);
+	return output;
+}
diff --git a/sandbox/shader.spv b/sandbox/shader.spv
new file mode 100644
index 0000000..db7c59e
Binary files /dev/null and b/sandbox/shader.spv differ
diff --git a/sandbox/shader.spv.txt b/sandbox/shader.spv.txt
new file mode 100644
index 0000000..0d65b26
--- /dev/null
+++ b/sandbox/shader.spv.txt
@@ -0,0 +1,39 @@
+Version 1.0
+Generator: 2560130
+Bound: 20
+Schema: 0
+      OpCapability Capability(Shader)
+      OpMemoryModel AddressingModel(Logical) MemoryModel(GLSL450)
+      OpEntryPoint ExecutionModel(Fragment) %12 "main" %6
+      OpExecutionMode %12 ExecutionMode(OriginUpperLeft)
+      OpSource SourceLanguage(NZSL) 4198400
+      OpSourceExtension "Version: 1.1"
+      OpName %7 "FragOut"
+      OpMemberName %7 0 "color"
+      OpName %6 "color"
+      OpName %12 "main"
+      OpDecorate %6 Decoration(Location) 0
+      OpMemberDecorate %7 0 Decoration(Offset) 0
+ %1 = OpTypeVoid
+ %2 = OpTypeFunction %1
+ %3 = OpTypeFloat 32
+ %4 = OpTypeVector %3 4
+ %5 = OpTypePointer StorageClass(Output) %4
+ %7 = OpTypeStruct %4
+ %8 = OpTypePointer StorageClass(Function) %7
+ %9 = OpTypeInt 32 1
+%10 = OpConstant %9 i32(0)
+%11 = OpConstant %3 f32(1)
+%17 = OpTypePointer StorageClass(Function) %4
+ %6 = OpVariable %5 StorageClass(Output)
+%12 = OpFunction %1 FunctionControl(0) %2
+%13 = OpLabel
+%14 = OpVariable %8 StorageClass(Function)
+%15 = OpCompositeConstruct %4 %11 %11 %11 %11
+%16 = OpAccessChain %17 %14 %10
+      OpStore %16 %15
+%18 = OpLoad %7 %14
+%19 = OpCompositeExtract %4 %18 0
+      OpStore %6 %19
+      OpReturn
+      OpFunctionEnd
diff --git a/src/lib.zig b/src/lib.zig
index e4a1bc1..edef74f 100644
--- a/src/lib.zig
+++ b/src/lib.zig
@@ -13,7 +13,7 @@
 //!
 //!         const allocator = gpa.allocator();
 //!
-//!         var module = try spv.Module.init(allocator, @ptrCast(@alignCast(shader_source)));
+//!         var module = try spv.Module.init(allocator, @ptrCast(@alignCast(shader_source)), .{});
 //!         defer module.deinit(allocator);
 //!
 //!         var rt = try spv.Runtime.init(allocator, &module);
diff --git a/test/inputs.zig b/test/inputs.zig
new file mode 100644
index 0000000..af9e100
--- /dev/null
+++ b/test/inputs.zig
@@ -0,0 +1,51 @@
+const std = @import("std");
+const root = @import("root.zig");
+const compileNzsl = root.compileNzsl;
+const case = root.case;
+
+test "Inputs" {
+    const allocator = std.testing.allocator;
+    const types = [_]type{ f64, f32, i32, u32 };
+
+    inline for (2..5) |L| {
+        inline for (types) |T| {
+            const input: case.Vec(L, T) = .{ .val = case.random(@Vector(L, T)) };
+
+            const shader = try std.fmt.allocPrint(
+                allocator,
+                \\ [nzsl_version("1.1")]
+                \\ [feature(float64)]
+                \\ module;
+                \\
+                \\ struct FragIn
+                \\ {{
+                \\     [location(0)] pos: vec{d}[{s}]
+                \\ }}
+                \\ 
+                \\ struct FragOut
+                \\ {{
+                \\     [location(0)] color: vec{d}[{s}]
+                \\ }}
+                \\
+                \\ [entry(frag)]
+                \\ fn main(input: FragIn) -> FragOut
+                \\ {{
+                \\     let output: FragOut;
+                \\     output.color = input.pos;
+                \\     return output;
+                \\ }}
+            ,
+                .{
+                    L,
+                    @typeName(T),
+                    L,
+                    @typeName(T),
+                },
+            );
+            defer allocator.free(shader);
+            const code = try compileNzsl(allocator, shader);
+            defer allocator.free(code);
+            try case.expectOutputWithInput(T, L, code, "color", &@as([L]T, input.val), "pos", &@as([L]T, input.val));
+        }
+    }
+}
diff --git a/test/root.zig b/test/root.zig
index 6eed822..784074d 100644
--- a/test/root.zig
+++ b/test/root.zig
@@ -47,6 +47,35 @@ pub const case = struct {
         }
     }
 
+    pub fn expectOutputWithInput(comptime T: type, comptime len: usize, source: []const u32, output_name: []const u8, expected: []const T, input_name: []const u8, input: []const T) !void {
+        const allocator = std.testing.allocator;
+
+        const module_options = [_]spv.Module.ModuleOptions{
+            .{
+                .use_simd_vectors_specializations = true,
+            },
+            .{
+                .use_simd_vectors_specializations = false,
+            },
+        };
+
+        for (module_options) |opt| {
+            var module = try spv.Module.init(allocator, source, opt);
+            defer module.deinit(allocator);
+
+            var rt = try spv.Runtime.init(allocator, &module);
+            defer rt.deinit(allocator);
+
+            try rt.writeInput(T, input[0..len], try rt.getResultByName(input_name));
+
+            try rt.callEntryPoint(allocator, try rt.getEntryPointByName("main"));
+            var output: [len]T = undefined;
+            try rt.readOutput(T, output[0..len], try rt.getResultByName(output_name));
+
+            try std.testing.expectEqualSlices(T, expected, &output);
+        }
+    }
+
     pub fn random(comptime T: type) T {
         var prng: std.Random.DefaultPrng = .init(@intCast(std.time.microTimestamp()));
         const rand = prng.random();
@@ -86,6 +115,7 @@ test {
     std.testing.refAllDecls(@import("branching.zig"));
     std.testing.refAllDecls(@import("casts.zig"));
     std.testing.refAllDecls(@import("functions.zig"));
+    std.testing.refAllDecls(@import("inputs.zig"));
     std.testing.refAllDecls(@import("loops.zig"));
     std.testing.refAllDecls(@import("maths.zig"));
 }