This is game design that was only half thought-out and an implementation only partially carried through. The result is atrocious. I could list all the the faults of this game but it wouldn't serve much purpose really. Avoid it like the plague.
Although the C64 version has come in for a bit of stick, the other 8-bit and 16-bit versions seem to have that all-too-rare element of catchiness which makes you want to play just until you've finished the next level.... and the next... and the next.