Invercity is a puzzle-platformer that features Handstand. Handstand looks like hanging when you look it upside down, doesn't it? This game really mak…

Equaline is a "one-stroke calculation puzzle" where you have to connect numbers and symbols with lines to complete a calculation. There is only one c…

"Treehouse Riddle" is an adventure game where you unfold its story by solving riddles and puzzles. Just like the treehouse itself, the 30+ riddles an…

In Pythagoras' Perpetual Motion Machine, use various contraptions to make your way through the game. The publisher of this game on Steam is DLsite O…