Had an idea for a smartphone game similar to Chu Chu Rocket (character changes direction upon touching walls/objects), except the player only needs to get one character to the exit and they have to collect a heart first. The arrows affect all active objects in the playfield including the character, hearts, blocks the character can move, security guards etc. Bottomless pits aren't included, but arrows can be placed on top of them. Stages can be split into 'active time' puzzles where the player can add and remove arrows all willy-nilly, and 'place and watch' puzzles where the solution has to be thought through in advance.
The fact the collectible is a heart, the exit is a locked door, the background is grass and water, the title itself etc tells you that this game idea is mostly running on placeholders aesthetically, but whatever. The idea is fun.