Huh, idk if it just me but I have tried multiple times trying to run away from the rock but the rock always outspeed the character eventually. Perhaps the timing to start running away after the rock spawned is too tight? (then I suggest loosen it a bit), or maybe there's a bug here that make the rock spawn too late? Are the player supposed to see the rock spawn out from the thin air (my experience) or are they supposed to spawn off-screen when player are nearing it? (I think the latter would be better designed, accompanied by a sound effect). Or did I just miss a sprint button lol :P