Thank you for improving on the original so much.
I loved the original Platform Racing, and this one somehow manages to surpass it further.
For one, the levels are a lot longer, and are actually a little bit better-looking. It's nice to see a fairly faithful recreation of a variety of levels from Super Mario Bros. in the game. The most interesting ones, though, are usually the ones that take advantage of the new types of boxes in the game. As an example, the "razorblade" level in the Campaign utilizes the Crumble block, a block that with disintegrate as force is applied to it, the Vanish block, which will disappear when stepped upon, the randomly-appearing Move Block, and the self-explanatory Swim Block.
And don't forget the powerups too! Aside from the standard items that appeared in the original Platform Racing, there's been inclusions like the sword, which makes the game more fun to play.
What is very cool about this game is the newly-added level editor. It allows to make your own map, and upload it onto the servers for people to play. It's fun to play other people's levels, no matter how crazy or convoluted they are.
An added bonus to the level editor is how easy it is to make maps. A lot of level creators in other games sometimes struggle with setting up an easy-to-use interface that provides a lot of features, but doesn't complicate things. However, it is extremely easy to place blocks down and create a map from scratch; in fact, without much effort, a player could easily make a good level in less than five minutes!
In general, this game is definitely on par with the original, if not better. The first revolutionized Flash games by having a platforming game be played online with other people -- this one one-ups it with longer levels, better-looking graphics, more powerups, and a sophisticated and easy-to-use level editor. A small nit-pick that I wish that you brought back would be the ability to jump on other people's heads and momentarily stun them, but that's a small price to pay for such an excellent, well-designed game.
Well done, Jiggmin! It's quite a fun game!