Hey, long time lurker I guess.
I've been working on an idea for a strategy game based on some doodles I made, attached above. It's meant to be a light game, but I'm worried it doesn't really have much going for it outside of the core fusion mechanic.
The objective is to fuse the "King Slime" before anyone else using a board of the weakest slimes. On your turn you can swap the places of any two adjacent slimes, or move a slime according to it's unique move. Different slimes have different movements, like pieces in Chess, and when you move a slime into another one they fuse to make a new slime.
Fusion is tier based, so when you fuse a pair of the same color you can choose any slime in a higher tier to put on the board.
Like I said earlier, that's pretty much all I've got going for it right now. The recipe for the "King Slime" would be 1 max tier of the six colors fused together. Bare bones, but any suggestions would be helpful. Nothing is grounded in stone for now.
I'm in the middle of building a prototype with some cutouts to play with friends and see how that goes. You can only move one slime at a time, yeah. For the king I'd work with a special rule where they automatically fuse when the required components are all adjacent.
All of the slimes have their own unique move that covers more area as they rank up in tiers. Tier 1s are basically pawns, tier 2 have more options in distance and direction, so on.