MAN!!! I am absolutely loving this game!! The levels are challenging but fair with the exception of a couple blind jumps. Complaints are obviously from players who never struggled through the classics without states, those are loaded with blind jumps and spike surprises. I have however, gotten stuck it seems. I have had it crash 3 times in a row at the end of sigma stage 1 as soon as I defeat the boss that moves the platform to squash you. Seems like its bugged. Playing on an aging Mac. Thanks to the dev for what is obviously a hardcore labor of love!
Also I'm not having any trouble with wall jumps, and IMHO the X collections on modern consoles have much more jank in the jump lag department.