I agree with your feedback and appreciate you giving it a try. You should be able to win. Sorry about the limited directions, was our first jam so learned a lot.
Also did you try the 3 pill combo of rgb? Should kill everything right around the pill. Nothing should survive it.
Easy I can win pretty often, normal is like 1/4 of the time, never won insane, it might not be possible but it should be, gotta be really fast though.