Just finished the game last night. Really, really enjoyed it. The game still hold up really well. Some things could be done better. Jumping down is awkward and doesn't work well, and checkpointing could be better. But TKing someone into an exploding barrel and watching them fly is never not fun.
I think I'm going to go back and get all the evil garden gnomes. I unlocked a couple of the Bonus challanges I hadn't done before and they were really fun.