I think there are some points to add the difficulty of the game.
1.Makes the track have some loops(just like the coster)
2.(This is a more exetreme version of the point 1) Makes the track looks like a knot, it makes the track dizzy.
3.Add a big uphill when the music is in high tide and add a gap in the end of the uphill. The plane will jump over the gap by the oblique acceleration.
4.Put the blocks in two levels. To collect the blocks in the secend level, jump.
5.Add a "Color blind mode". This will replace the color blocks with the blocks of pattern. This is useful when the player is a color blind.(One of my friend is.)
6.Play the part of the music. Select the part of the music you want to play. This will avoid the short but loud cheer.
7.Add some magnets on the side of the track. This will attract the plane and let the player hard to collect the block on the other side.
8.Add some junctions on the road. Some small roads will harder than the main road, others will easier than the main road
9.Let the game display chinese characters correctly.(And all other full-width characters)
10.Add a special block:two color block. This block can either be a block with one of its two colors or a block that connect two blocks with its two colors beside it.
11.Add a special block that you can't see its color before you collect it(Very hard to play with this block)
12.Let the player held some competitions. All people who join the competitions will race in one track(It can have two modes. In mode 1, people are split into groups. People in one group can cooperate. In mode 2, people are all independent.)
14.(13 is jumped by the triskaidekaphobia
)(An update for point 12)In mode 1, A man can punish another man in his group.
15.(An update for point 12)The manager of the competition can set whether a man can defect to another group in the game.
final, happy new year to all chinese friend
