Found some funny guys in level 3 and 5, and am not sure if they're supposed to mean anything. Also heard of one in level 6 that I could find. I have all bolts and all gold times in the first 2 worlds. Do I just need to 100% the rest of the game?

are there secret levels? how do I play them?

help i 100%'ed the game i think

please tell me how

i have only played for 4 hours and i have a 12.58 second run of the first level