Lovely game. Fitting plesant music, mostly beautiful backgrounds (the secret tower level could use some extra decorations - windows, torches paintings maybe?) and easy to learn controls.
I do also like there being a different ending for those that like a bit of challenge in going through the "secret" level.
The tower was also nice that it had a different gameplay feeling than the other levels (from my perspective ofcourse) in that it felt more of a puzzle game than platformer, having to carefully plan when and when not to jump, which platforms to avoid as a basically death traps etc. Took me a few hours before I managed to beat it (partly some of it was my fault like forgetting to not jump in a section where jumping basically puts you into losing position).
Still, I pesonally enjoyed it and wish you luck in your future projects.