Spoilers ahead!!!
For anyone stuck on level 15, I offer you this one hint: You can bounce off the skull and switch directions and still make it back to the platform you started on.
This game was simply amazing, I rated it five stars. However, many games such as this are really great. One of the many qualities is how active the developer still is, and how much he interacts with the community that enjoys this terrific game. If you're reading the comments while the game loads, I highly encourage playing it all the way through.
0rava, I just wanted to let you know that the game is awesome. No matter what some kid in a bad mood may say about how unrealistic it is, (or something like that) the work you did was phenomenal. 5/5 stars.
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Hey, glad you enjoyed it! Meant to respond to comments sooner, but keep ending up busy with work. ^^'