I like the idea of your game to have a small room with the ability to rewind. I had some fun playing it. After some polishing it´ll be a great game without the problem that you can just stand still do nothing. But there were some things that I would change:
- I would make it that there are not that many enemies at the beginning since it was really hard for me to survive more than 5 seconds.
- I would make the player a little bit faster but not as fast as the enemies so that the player is able to dodge the enemies a little bit easier.
- I would let the player control his shield with the left joystick because for me it was hard to aim
Overall it´s a nice game. Good Job! :D