Hey, pretty cool game, especially considering the time constraints!
That being said, here's some feedback, not sure how much of it you're already aware of but here it goes:
- Hitting enemies doesn't make them blink in red, which made me think there was new enemies respawning on top the the ones I've just destroyed.
- Not being able to restart the game after death without reloading the page is really not ergonomic.
- It is unclear whether there is an end of level or not, it's kinda weird to be upgrading the player mid-fight. Clearly limited levels with a progress bar of some kind and a shop level would help.
- Having some sort of healthbar is a must since as it is right now, there's no way to know whether the player is close to death or not.
- And lastly, pretty sure you're aware that the credits menu is effed up with this resolution right now.
But yeah, despite that, it's a pretty cool little game, can't wait to see what it becomes!