Mini Ninja - it has it's Pro's and Con's...but it's cheap, and easy Gamerscore!
I've done one playthrough of it, and gotten 660 Gamerscore so far. I'm aiming for 1000, but not just yet! Anyway, yeah. That's one of the Pro's about the game for all Achievement Hunters out there - it's an easy game to get 1000 Gamerscore on...Roughly about 10 - 15 hours, is what I would say. It's quite fun casting the magical spells, watching the characters you unlock run like a rabbit who is having a sugar rush...The Boss fights seem complicated, and it may take you a while to realise what you have to do in order to defeat a boss, but once you have realised, to actually defeat the boss is rather easy. That made so much more sense in my head. The graphics are decent for a game of this standard, also.
But, the game also comes with a few problems. One being the saving part of the game. Sometimes the checkpoints are placed in well-hidden spots, and it can be frustrating when you die and haven't found the last couple of checkpoints - you have to start right from the beginning again. Also, there can be a few minor glitches here and there...and just general jumping can be a right pain.
All in all, it's decent.
All of this I'm saying is just my opinion, too...so y'know...make your own opinion, I'm just sharing mine!