Hey ! Very good game for so small ammount of game good job.What engine you used to make it though ? I'm new to these stuff and I am mostly practicing with unity what engine you used to make this game ? or programming langauge I guess
There is a way to render all objects with a pixel effect in Unity using an image effect on the camera. So in other words, you can make a game just like normal (with normal details, etc) all you need to do is add this image effect to the camera and the game will output in a low-pixel rendering. Makes it a whole lot easier to get the desired effect.