The gameplay is solid and responsive, only sliding down slopes feels strange. I like the idea of collecting upgrades and that the first enemy has to be dodged instead of attacked to show you this is also an option. The flying mechanic is really well implemented and the flashing clearly shows that your flight is running out. With some contortion you can hold down E throughout the game and auto-attack anything that comes near, so I think having the attack on keydown only would be an improvement. Fun!