Henyo! Thank you for reaching out to me to try out your game!
It was my first ever bullet heaven and it was an interesting experience, especially when you just need to survive for a time limit. I do have a couple of comments regarding it but please don't be discouraged, I hope they would help in progressing and improving your quality of life for the game.
Mini tutorial would be nice if you would like players to jump in and playtest mid game to help players get up to speed on things.
Instructions on what to do for the levels would be good since the dinosaur level has new mechanics that weren't really explained in terms of matching the colour of the dinosaur's "aura" to the colour of the mushrooms.
Game might be too heavy when there is too many NPCs spawning which had lead to the game lagging and eventually crashing.
Overall I really love the art of your game, some scaling of the animals seem weird but that might just be because I'm not too sure of the context of the story since I started at the levels you needed help playtesting. I'll try to advance further into the levels when I've got some spare time but apologies if this VOD wasn't as much as you expected c':
https://www.twitch.tv/videos/2547473584