I really hope you lower the exp to level up by, like, 100 or so because the super high amount of exp required to level and the lengthy repetitive games really discourages me.
You should be able to get more generators w/o the use of robobucks, atleast 2-4. If you already are able to and I just have not figured it out yet, disregard this.
But the controls need to be revamped. W forward, a turn left, S reverse (if applicable), and D to turn right. Not each key going in a specific direction.