You gotta go to right and jump left like 3 times so you can get the +, then you gotta go right. If you dont mess up, you should win with 34 steps leftover, so on level 4 you got 82
In case you were wondering for whatever reason. Fun fact: Wave 100 and up spawn 4 pigs per second, and the amount of pigs in each wave no matter what number is the wave number multiplied by 2.