basic game logic with simple translation animation

shaders/ui.vert

@@ -0,0 +1,11 @@
+#version 330 core
+layout (location = 0) in vec4 vertex;
+
+out vec2 v_TexCoords;
+uniform mat4 projection;
+uniform mat4 model;
+
+void main() {
+  gl_Position = projection * model * vec4(vertex.xy, 0.0, 1.0);
+  v_TexCoords = vertex.zw;
+}