thank you so much!! you are totally right I should have made a proper end screen. I'm not sure about which shader it's but I used Dithering FX by BigBuckBunny on Construct 3.
thank you!! It's made with Construct 3. It has very limited 3D features but it's fun to use. The main effect is Dithering by BigBuckBunny. I used some tricks and other effects to make it look like this.