Collision doesn't work

For some reason my collision command doesn’t work. Can someone check what’s wrong with my game? Link:

Use boundaries on your levels, otherwise you fall of …

I don’t get why you’re messing around with mailboxes and messages you can just set a behavior on the bat that goes.

Collision (Chest) > Alert > Pause > Next level.

Collision ( Spikes) > Restart Game

Collision (Saw)> Restart Game

Stop fking around with mailboxes