It's very little, but worth those 0 dollars and 207 blocks.
Excitebike was first released 1985 for the NES. That's why this game feels so little. There are like two modes, section A and section B. Section A has you racing through 5 different tracks (the last 2 being really hard) in a particular amount of time. Section B has you racing the same 5 tracks again in a particular amount of time, but this time lots of different drivers are also driving along the track. That's it. No more. The tracks in this game are quite decent designed, but the game overall has very little to it. Luckily, you are able to customize your own tracks to extend the games length a bit.
The only addition to the game is the 3D effect. Fair enough it does look good and there is a great sense of depth. Plus those graphics look kinda cool in 3D.
Now there isn't much speaking for the game. Compared to nowadays standard games, this game is ash. But it's for free until the end of June and it is worth downloading. The only thing that it costs are 207 blocks of the SD card, but that shouldn't be a problem. There is barely anything to do in the game, but that what the game offers is pretty neat and it's worth those 0 dollars and 207 blocks.