Alchemy Quest by usr_share is a PICO-8 game.

Alchemy Quest is a WIP port of the puzzle game OpenAlchemist, which was developed by Guillaume Delhumeau and Antoine Morineau.

The objective of the game is to combine three pieces of the same type together, which merges them into a different piece. As more pieces are unlocked, the falling pieces become more varied and the game becomes more difficult. There is no fall mechanic, which means the player can take their time before deciding where to drop and how to rotate the piece.

http://www.lexaloffle.com/bbs/?tid=3900