I had an idea about the chests in game. i thought, what if there were different kinds with different rarities. so, of course, i made some.
Normal chest, the one already in the game, stays the same.
and then the rare chest, which of course is rarer, and will drop more coins upon being broken (around 2-5k coins), and must be broken only by throwing a sword, and not swinging the sword.
an epic chest that drops 5-25k coins upon breaking, and takes a few hits to break
then the legendary chest, which is super rare, and hardly ever spawns. it takes a few hits to open (dropping anywhere from 10k-100k coins) and maybe gives you strength for 15 seconds (just an idea)