Very well done, especially for 12 hours, (also watched your devlog and liked it a lot so +1 subscriber for you), one thing that I might suggest is making the spike hitboxes a little smaller just because there was a few timers where it didn't look like I touched the spikes but I still died (Then again that also might just be cause I'm bad at the game)
Nevertheless still quite impressive for 12 hours, well done.