I liked that game! I think it was a cool little first project.
What I would advise:
- Try to make a menu with instructions, even if it is pretty straigth forward it is always cool! ( This video is really good for that: https://youtu.be/1_OFJLyqlXI )
- Enhance the difficulty and the level design, it was a bit easy, I know that difficulty can be subjective but I would just complete one of the puzzle and it would be stuck in the end case so I could do the other one without really impacting the first.
- Some sound effects as well as visual feedback such as screen shake, even if they are borrowed or cheap could add to the immersivity.
- Only needing to press a input once, I don't think it is particularly necessary to press 2 times one input to move.
Have a nice day!