I like the boss rush at the 6th level, have yet to beat it but it is a fun trial, the one with the sword and shield is really difficult.
Noooooo, I got through every boss except for reaper and knight, and got the knight to 1 carrot missile from death, and then died because I couldn't land the final blow (darn shield)
I got another one where I had every boss done, but then on the last one they rewinded the battle back to the start when they and me were both 1 hit from death, dooming me