Hello, I'm Zaner, the guy who started running this game.
Before running this game, I recommend completing it at least once. For your first runs, just time yourself completing the game. Eventually you will find little things that save time. Below I will list any notable tricks that will help.
The best way to get past a dog is to jump over it. if you are not perfectly straight, you can still be eaten by the dog.
If you think there is a possible way to save time, try it! You never know what could help. The most common thing that I find to shave off milliseconds is corners. Jumping around corners saves a little time.
IMPORTANT NOTE: If you press two buttons at the same time, one of them won't register. if you are on a small podium and need to get somewhere, always JUMP then MOVE. Also, if you are holding a button down before a level loads, it will not register when the level starts. An example would be if you hold W to move forward at the start of a level, you won't move when the level loads. My best advice is to start holding down the button a couple seconds after the truck leaves the screen. This might not always work, but you will find your own techniques as you become more comfortable with the game.
Splits tips: I have my splits available for download. These are good for knowing what levels are next.
This is all the advice I have for now. If you have any questions, feel free to message me in the WAKU Discord Server. Thank you for your time, and welcome to the WAKUWAKU VEGETABLE Community!