Hi! Thank you for the feedback, it is most welcomed.
First of all re-chest, when you come near it, if you've taken damage, you get back one heart. Inside the chest is a piece of cheese. I understand now that I should have made the interaction more obvious. The fall feeling very quick is also intentional!
The code, art and design were all developed in a week so I didn't have a lot of time for refinement – I'll keep your suggestions in mind.