Known costs
Level 1 to 2 costs $10K and Level 2 to 3 costs $100K in the current screenshot field report. Later costs are not yet captured.
Known gain
Level 3 was observed adding +25 Speed per step. With the Blue x2 trail active, the same report observed +50 per step.
Training mini-games
The report shows Flappy Chicken, Perfect Hit, and Egg Rush while training. Their exact payout rules still need repeatable capture.