Foddy has long held that he feels "it’s a worthwhile exercise for any game designer to make a chess variant, a dice variant and a Pong variant."

I'd almost call 'Zipper' his soulslike.
Maybe an overstatement, but it is certainly in that realm of risk and repeat, callous brutality, etc... (I know it's a stretch but it felt right so idk)

Zipper is a retro computer era inspired action puzzler that has the player control a samurai on his quest to assassinate a nobleman of sorts.

You move in one of four directions at a time for as many spaces as can be achieved in a straight line. Enemies get as many 'moves' as you do for the most part. You can use the crank to visualize what will happen ahead of committing to a move, every mistake is your fault since you can literally SEE what's about to happen.

After some trial and error you'll easily master this game and see it through.

Zipper is not truly on the scale of 'getting over it' but it's certainly another masterclass in simple game design.

This game kept me coming back until I felt I had it beat, and then i still came back to see if I could do it any better.