I refrain from voting, because I couldn't figure the game play out fully ;)
Also, something is off with the sizing. Embedded in the page the display is too small to show the choice arrows. In full screen the bottom right of level 2 is not visible (so you don't see the platform to reach the mailbox)
And then I couldn't figure out which coin combination made me survive the way back in level 2.
As far as I could deduce: Collect two coins, go to the mailbox to start the night, and then return to the shop. However you're getting hurt when starting night; plus collecting a third coin stops the effect of two?