Hey!
First of all, great game! I love the pixel art the the music is very retro, nice work! I think the level design was also really well done and the theme was there.
If you want some feedback, here's mine: It would be great if you can automatically respawn the player when he lose, rather than having to press R every time.
Other that that, a really great game, I had fun playing it. Congrats on making the game on your own in one week!
I would love to have you playing mine too, if you don't mind of course! ^_^