Cool proof of concept! The controls are responsive, the enemies are fair, and the art is pretty good too. I do have a couple suggestions moving forward though:
- Overall, the game is pretty easy right now. However, that's to be expected from something this early on in development. Increasing the difficulty is a pretty easy thing to do as you add levels.
- I like the explosion effects, but I would recommend having a different animation/sound effect for when the player blows up, and for the boss, only have the explosion sound effect play when one of the orbs actually explodes. When you only damage the boss, maybe have the orb flash so that the player still sees that they got a hit.
Good job on this! Looking forward to seeing what you'll do in the future!