Very cool homebrew! Def a solid effort for a GBStudio project, but the original game played much, MUCH better.
Here, the witch feels super slow and heavy - it takes forever to get up to speed, and vertical directions barely respond at all! Since GBC has a much lower resolution than ZX Spectrum, the flip-screen format doesn't really work anymore, especially since the speed resets each time you enter a location.
Also, the landing pads work very hit-or-miss.