Potentially good mechanic for a puzzle game, but it did feel like it didn't have any real difficulty to it. Because there was no downside to placing a block, the player can just place blockades wherever they feel like and basically just clear each level by racting to the updated path. I also feel like the time based aspect of the puzzles should either be emphasised more or removed completely (through a pause function or similar). Because in it's current state the timed aspect doesn't enhance the puzzles in any real way, so either I would like to see the time aspect either removed completely (with some clever level design to make up for it) or I would like to see puzzles that are only solvabe then using time to your advantage.
I also found a bug where you could place block ontop of foods (the bad ones) and the pathfinding wouldn't update making the player walk into the wall continously (until I placed a block on the character and it spazzed a bit and then started the level over again).
Nice puzzle game with potential.