Try refreshing the page. This has happened to me before with Construct games (whenever I add music to them for some reason) and I'm yet to find the cause.
Some bug restart checkpoint. I complete first level and exit from cave. Then I try jump to right on pipes and drowned. Game load me on boat. I go to first cave and press R. Game gone mad.
Its reported by only you, no one else reported this. I couldn't simulate this situation at my devices. Can you tell me more about this?