You should be able to drop them at any time, so I don't know, I have to go back and keep playing it. Do you know which level you were on when you couldn't drop him? Were there any other enemies passing by?
All three enemies are based on patterns, however the red guys have the longest followed by the green guys then followed by the blue. It will probably be a thing I need to tweak though to hit the sweet spot. Where it seems totally random, and yet is not. Anyways the red guys are supposed to be more unpredictable than the greens than the blues.
As far as only blues spawning, the spawn in an order and a quantity. This to be tweaked later for final release, but it will spawn 3 blues, then 2 greens, then 1 red. However, it will spawn them faster if you remove them faster. So sometimes it will seem like more blues because you got the others out of the way. Also it resets when you die, so I might think about not resetting it when you die so you can get that good mixture.
So really the main bug is that you can't drop enemies sometimes. I'm working hard to figure out where it's doing that, and why. Thanks for the valuable feedback and for just trying it out.
gave it a go, it still seems a little buggy to me. i grabbed one of the green guys, but could not put him down. when he dropped by himself it killed me. the red guy seemed very random in his actions and hard to predict. as he seems to be able to move in every direction, it did not seem like i had much of a chance besides luck. not being able to hypnotize from the back kind of makes sense, but it does make the game harder.
not sure how I feel about the game idea in general. it's as you describe a mixture of a lot of different ideas.
maybe it needs more options? like kicking hypnotized enemies around to knock out others? I also found it weird when on level one there were only blues spawning, but in my pit i just had red and green.