Intruder!
Awesome graphics and music/sounds!
Here's a couple things I noticed though:
It was cool to run fast but slowing down during an attack or something felt a bit off. Not sure if this is required for the gameplay, maybe it is.
As already mentioned, having multiple kinds of enemies was a good way to stir up the gameplay.
The puzzles were pretty straightforward. I think there may be two ways for these (just my two cents): either make them more complex (with a difficulty ramp up etc.) or execution-based (like some Mario Maker levels perhaps? so that you can try and speedrun these). Also, some kind of indication which button does what would be nice (at least if going for complex puzzles).
The game crashed once but it ran just fine on the second try. My time was 5:20-5:30-ish.
Overall, I liked the game, wouldn't mind to play some more levels!