We had plans for a "good" ending but didn't have quite enough time to implement and test it properly before the deadline. It's something we're probably going to add after the rating period is over.
That's helpful feedback, thank you! I didn't really know how much leeway to give with the brightness, so I'm glad that you were still able to finish the game.
We actually are recently aware of that goofed tile sprite placement. We were hoping no one else would notice before we could fix it, but there's no getting by you!