Oh god, this should be fun. The same person behind the notoriously hard Item Abuse series of SMW hacks is making Mario Maker levels, and they're also kaizo difficulty:
God help you if you get these in the 100 Mario Challenge, since you're pretty much dead right there if you don't skip them.
God help you if you get these in the 100 Mario Challenge, since you're pretty much dead right there if you don't skip them.