Hi :) New update to meet our player's feedback is here.
The Level 3 difficulty was designed to be hard. That included the white balls that can fail you if you push them into protein pick-ups and other slowdowns. That said we think that we were a bit overzealous with setting difficulty so high. This update will lower it to a reasonable level.
If it's more comfortable for you to use NumPad in racing ('8456' as 'wasd' analogue) - now it's possible :)