Well I gave this game several good tries over the last month.
I left everything on default, other than changing Player 1 name to my own.
Either my wireless joypad has a bit of lag or my reflexes are shot, the latter being the most likely
I'm completely awful
I think I got 747 points, that's for the whole 7 levels.
Tough game IMHO!
Played on my A1200 PiStorm32, no keys, passwords or cheats were used.