Project as is

res/shaders/default/default.fs

@@ -0,0 +1,9 @@
+#version 450
+
+uniform sampler2D sampler;
+
+in vec2 textureCoords;
+
+void main() {
+	gl_FragColor = texture2D(sampler, textureCoords);
+}

res/shaders/default/default.vs

@@ -0,0 +1,13 @@
+#version 450
+
+uniform mat4 projection;
+
+in vec3 vertices;
+in vec2 texCoords;
+
+out vec2 textureCoords;
+
+void main() {
+	textureCoords = texCoords;
+	gl_Position = projection * vec4(vertices, 1);
+}