Oh there's an ending. 2 endings actually. Look for something distinct and press interact. If you find something that looks important but can't interact with it, like the gates, you don't have the right key yet. I didn't think to add an "it's locked" message.
Yeah, the idea was to mimic one of those old 2D dungeon crawlers like Dungeon Master, Eye of the Beholder, or The Bard's Tale where they use 2D pictures to mimic 3D space. It's much easier to use 3D to fake 2D faking 3D if that makes sense. That and I wanted simple gameplay so I could focus on the art, which took a whole day, day and a half of the around 2 days I had to do this. Little easter egg, press Num + in game to toggle sliding mode. It adds a movement and rotation lag to the camera, so you're still teleporting between spaces but the camera slides along behind it. Careful, it's nauseating.
And thank you so much! I'm glad you enjoyed.