Each colour has a different function. Red tiles are impassible. You can't walk on them. Yellow tiles are electric. You can't walk on them. Blue tiles are water tiles. If a blue tile is next to a yellow tile, you cant walk on it. Orange tiles are orange sented. They make you smell delicious. If you smell like oranges, you can't go in water, or the piranhas will bite you. Purple tiles are soap tiles. They will make you slide across them. If you smell like oranges and you walk on a soap tile, you will no longer smell like oranges. And lastly pink tiles do nothing. Walk on them all you like.
This game was inspired by the multi-colour puzzle from Undertale. I give credit to that game for this idea.