Cool game,
at first I didn't understand what to do,
and the player movement felt bad,
But when I understanded what to do the game became fun very quickly.
Wasn't expecting the boss battle at the end, very cool felt a little "scripted" but overall a very enjoyable game that you could easily turn into a full game.
In short the only problems with the game (for me) are that you should add a better movement, and a tutorial at the start.