@justuspan There's 3 rooms in total. The key comes from the first room in the bottom-most door and the lock is in the second room through the 2nd level door.
@fronwewq Haha, that block-jump mechanic was totally unintentional. I didn't discover it myself until a couple hours before submitting and had no idea how to fix it. So I'll just call it a "speed-running strategy" :)
@blobo Thanks. I'm pretty inexperienced with pixel art and I'm happy/surprised at how well that character came out.
@minibobbo Thanks for that suggestion, it never occurred to me to stretch out the edges of the tiles a little bit to prevent gaps.