Love the atmosphere in this. The art and music together are very nice. The controls took a bit to get used to, but once I got the hang of it, things went a little better.
I feel like the game could benefit from either more generous checkpoints, or for Shor to be a little less fragile. One mishap with those spikes and it's back to the beginning. I might come back and play this more, but I'll admit I rage quit after the 15 item door barrier thing, because I died on the spikes there from a single poorly pressed key after making a jump and didn't want to start over again.
Anyway, if this artwork is custom, it's very impressive! Congrats on finishing and submitting your demo. I may come back after I've had some time to recover from losing my progress. The switching between characters was an interesting gimmick.