Very good trailer. I need a new DS game and I'm torn between this and Retro Game Challenge. What to do ... what to do ....
Both. Seriously. But if you absolutely can't afford both, here's my guidance.
Hatsworth = if you like really hard platformers (and I know you do) and/or puzzle league.
Retro Game Challenge = if you have a lot of 8-bit nostalgia and want more variety. It's fairly easy to progress through all eight games, especially if you use some of the cheat codes provided.