DIAM - GameBoy puzzle game made with GB Maker

This is DIAM. Short 9 level puzzle game made in GB Maker.
It was originally made by my dad in Pascal for DOS when he was 15
Now I ported it to the GameBoy using the tool i made for writing gameboy games.
Hope you'll like it! If You want to support me, consider buying GB Maker. I'd realllly appreciate that :D