Use the left and right arrow keys to move around. You can press the up arrow or the space bar to jump. The cat's stats are in the top right corner and the coins' stats are in the bottom left corner. The number of coins you have is at the top middle. The probability that any one coin is a big coin is "1/Big coin rarity." If Big coin rarity is 2, about half the coins will be big and if Big coin rarity is 1, all the coins will be big coins. The big coins are worth 5 normal coins. Increasing your jumping distance will also increase your jumping speed. Click on the shop to go to it.
carlosluis20 for a lot of this