Of all the Metroidvania Month Jam games I played, this one was the most creative by far. Not necessarily most original or most finished, there was ambitious ideas here that I really appreciated.

I do need to nitpick the sound though...That jumping noise got annoying immediately. i played the game with the sound off.

I can't play this game. There is an error no .pck file. Let's try again.

I think that the .pck data file required to run the game is missing, at least for the Windows build. You normally zip the exe and the pck together for users to download. Same with Linux build also.