Hi Thanks for your reply ^^ I hope the game wasn't too frustrating. We should have added a tutorial that explains our somewhat unconventional game mechanic. You propel forwards in the direction of your ship during every heartbeat. Grinding against the walls of the blood vessel increases your speed. So the trick is to steer your ship correctly between every heartbeat interval and grind along the edges. It takes some practice but if you get the hang of it, it becomes really satisfying (If I may say so myself :P).