Really reminds me of my old games when I first started. If you are new to it, nice job, and I hope you continue. You'll only get better with time. If you want my advice, try learning how to move the camera, because then you can make larger levels, and that's the first step towards making even more complete games!

An interesting gameplay idea.

Forgive me if I'm wrong but the feel of the controls/wall phasing feels like a bug you decided to make into a game.

The enemies need to be more consistant and also the game kept resetting the level even though I didn't touch any red.

Keep going!