Encontre un bug en la parte de la gata. Si sales del juego despues de guardar ahi pierdes todo. Al menos conmigo perdi las otras dos medallas y las botas voladoras sin incluir que no puedo salir de ahí.
Viewing post in Drain Mansion - Free Version comments
This is fixed in 1.1.5. Until then all I can say is if this happens, don't save, just exit back to the menu and load it back again, your items will be back. If you save like that though, your save file will be ruined. This bug happens if you spam the reset button after you have died. So it is easy to prevent this bug if you only press the interact button once, to reset the game.