For the Partial Blast Doors in world R3, there is a similar mechanic in GATEPASS (a game by Necoroneko, the developer of I Wanna KeyPick 100), which is a door with a circle with a part of them shadowed similar to a pie graph with a percentage text like "25%" above the door (similar to the "×2" text on a copied door in Lockpick), which costs a certain percentage of your keys when you touch them, but you can touch those doors with any keys (probably), and your keys will be rounded to an integer after it.