Thanks for your detailed review of the game! I'm glad you liked the environment; It feels like most of my development time was spent on building that! I'd not done a lot of environment modelling before, so I wasn't sure how it would turn out.
I agree that the ending probably needs something rather than just dumping the player back on the title screen. I blame the fact that I didn't get around to working on the ending until the very last day of the jam! I'll add a 'To be continued' or a 'Thanks for playing' in the next build.
And yeah, the ability to jump needs to be introduced a bit better; I had plans for tooltips to introduce all of the controls, but ran out of time, so the one for switches was the only one I managed. Jumping over a crate is a good idea, too, so I'll probably implement something like that.
Thanks for playing!