I think your idea here is solid and the checkpoints are a great mechanic. However It seems like most of the time you just launch the car a direction and hope to build hella speed and eventually hit the goal. Perhaps some more friction on the car would be a pleasant tweak but thats for you to find out. The potential is definitely there!
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Thank you for your feedback, much appreciated! We are aware that most of the levels are eventually beatable through chance, but if you really want to make a good time there is an ideal path to find for each track. We figured since this is supposed to be a racing game it was a good enough incentive :) But I definitely see what you mean and how the level design could be more advanced!