One of my favorite games on the PS1 was [b]No One Can Stop Mr. Domino![/b], and it was hard as [i]balls[/i]. You're basically a domino dude on a grid-based racecourse-esque track, and you have to lay down dominoes so you can push them over to activate floor switches when you loop back around. Pretty great concept, but the last level requires goddamn [i]perfection[/i].

I also remember playing [b]Pac 'n' Roll[/b] for the Nintendo DS, where you roll a ball-shaped Pac-Man around 3D maze-like levels  It's been ages since I've played it, so I honestly don't even remember if it was good, heh.