Very clever variant of the catch-in-three-positions mechanic! And how cute! And icecream! And a serve-the-customer mechanic! It get's better and better. Graphics are spot on, although I would have preferred if it had a real LCD game look, rather than a pixelated Gameboy emulation one!
P.S. played the hell out of Oil Panic lately! Now that you mention it, I see the inspiration...