I like this as a simple first person dungeon crawler, and reading up on Mictlan I honestly think this sort of game is the perfect fit for exploring it more. The gameplay itself is rather simple and there's no audio (at least that I could hear, but maybe that's just on my end please let me know if that's the case) but the MS paint art and the varying room appearances gives it a nice charm.
Out of curiosity was there any specific game you used as a reference for the gameplay style? I'm familiar with the Grimrock series, Dungeon Master, Legio and Eye of the Beholder but I'd be happy to hear about any others. And if there is no influence of another game then kudos for having it all come together.
For a first solo game I thought this was nice, good work!