This is actually an intended mechanic! If you keep chaining shots into Wasps, you can keep shooting them until you stop. The more shots you land the more overkill bonus you receive, but it caps at a certain amount.

That's really strange. If I have some time this week I'll look into it and try to push a fix.

All 3 bosses should open up a hole in the floor for you to drop through, barring any bugs.

Thank you for your comment and appreciation!

https://jumpbuttoncb.itch.io/god-i-hate-wasps

Unless I completely forgot, there should be one secret room in Stage 1, and two between Stage 3 and the Final Boss for a total of three, but you may count those second two as one

I was quite sure if I didn't note that I changed it in the patch notes that no one would ever find it lol