A nice game :) Some things were missing though, that would make a great addition to the game:
- Music and sounds (I didn't hear anything. I even had to test my headphones to make sure that they worked).
- It felt like I was moving on ice. It was hard to control, and I often ended up "sliding" into the enemies. For this kind of games, I prefer snappy movement, where the player can 100% feel and control the player.
- And maybe make that the player needs to defeat all the enemies before reaching the finishing line (because now I could just run through the enemies and complete the level)
Additionally, better graphics and animations would also be cool, but I think first it is important to focus on these three things above :)