This was a great game :D I would like to leave some helpful tips as it seems like you are new to making games but I see a lot of potential
1) Think about sound effects when they loop, sometimes it can become annoying (The laser sound effect)
2) When you have text (Menu or info in the level) Think about the readability and the placement, make sure relevant text is close to eachother and some form of border can be nice to let the text stand out.
3) The timer has no real purpose, id scrap it
4) Good job allowing some levels to have multiple ways to beat it, that is very good game design!