at minute 6 I had too many enemies so the game started kinda lagging. Perhaps it make sense to limit amount of enemies which can be deployed at once as it is done in vampire survivor or risk of rain
You're 100% right - there are several small changes like that which would definitely improve the game. This is definitely one of those! And probably making the enemies a little easier to kill so there are less on-screen as the new ones spawn in. Thank you for the feedback!