Some things need polishing (strange shadows, character showing through walls) but the puzzle aspect is solid. Controls could get on someone's nerves, witht two keys for one diretion, but I've been there myself and don't have a real solution for that isometric quirk.
Graphics are good though, and the levels go on quickly without being boring. I can see this going somewhere, with maybe the owl really appearing and using more varied prompts at the start of each level, or other minor ambellishments and more levels. Great work!