Jake the Snake isn't all that long. You'll need to get him to grow before he'll be able to reach the exit on each level. Even then it isn't always easy to figure out how to get him to the exit without Jake falling into the water or hitting dangerous obects.
Have Jake eat all of the stars on a level to enable the exit. As Jake eats the stars he will grow. Don't let Jake hit any of the dangers on the levels or fall into the water. Keep in mind that the stars can act as a platform and can support Jake. Use the WASD or arrow keys to control Jake or on touch devices swipe with your finger. If you want to reset the levels (re-locks all the levels except level 1) use the Clear Data button on the Levels menu.
Evo D
Bts H
My Sc
Farm
Bucke
The H
Old A
Block
Wordy
Stick
Fidge
Walk
Bingo
Excel
Icy P
Skibi
Ultim
Speed
Drive
Tunne
Hit T
Real
Princ
Weste
Jungl
Tiny
Mahjo
Jumpj
Cute
Sheep
Fun D
Maste
Rescu