Done! The theme is pretty well implemented. My concern is that, in the first part, there doesn't seem to be any threat of defeat. Because, well, if the player were to encounter a hostile monster, they can just rewind, et voilà. The challenge is missing.
The second part is different. The player has a preset amount of lives and must escape the king of monsters before their life counter falls to 0. There is now a threat of losing, and that tiny difference alone makes the second part already a lot more fun. Well done!