How is "Astro Boy: Omega Factor" for GBA?
 

Seems interesting and highly rated so thinking about it as I like those type of games. What other games can it be likened to? And is it fun and long lasting? Thanks.

Fantastic game. It's not too long - 8 levels with sub-stages - but there is solid replay to get the "real" ending. Its classic 2D shooter/light platformer gameplay is executed extremely well (Treasure) and is reminiscent of the best 16 bit sidescrollers. I'd guess most would call it Mega Man-ish.

I think it's overrated. Rather dull repertoire of moves, coupled with overly episodic fights (move here, next set of enemies...move there, another set of enemies). I played through about 3 levels and just gave up due to sheer boredom.

Instead, I moved on to Zelda: Minish Cap and am MUCH happier.