The only trouble is you're never really all that in control of things and can spend too long just waiting for something to happen - and its very easy to get stuck. The aim is to build complete rows within the trap your character has fallen into. To this end, you can shove some blocks around, but only push - never pull - and you have a small supply of bombs to get rid of unflattering lines.
Get a sub-row of three or more matching objects and you score more points when the row completes, complete enough rows and you escape the level. The real trouble is that your bombs are more likely to kill you than help and getting hit by a falling shape means instant game over.
The overall mechanics of the game don't make for a fun or particularly friendly or challenging experience. In later levels, rockets and other challenges are added to the mix, but the core gameplay just doesn't really grab. A shame, as everything else has the potential to entertain.
Perhaps if the character could hammer and break blocks (like Rockman) this would be a better game. It needs something more, that is for certain.