Really enjoyable car racing game, best I've played to date. Improvements could include: wider selection of tracks; continuing ability to upgrade HQ after level 10, e.g. 11, 12, etc and further HQ upgrade projects; reduce cost of materials and/or increase ability to earn padock tokens through race results, daily logins, watching adverts; continuing ability to purchase better drivers, engineers, and staff in tier 7; ability to further upgrade drivers and engineer in tier 7.