Spoilers:
I found it really cool how you used the title screen / itch cover as one of the endings. Very good use of the jam limitations. You either get a cute fulfilling follow-up to the letter, or the gut-wrenching 'oh no!' moment that brings that image into context, which is strangely beautiful in a bittersweet way.
I love how you could totally feel the one-assetness throughout this work too (pretty unique for picking a non-person as sprite). It's well-executed minimalism.