This is the best derby game I have played so far. I am actually a derby driver and this is the most realistic and fun. Needs some work though.
-Remove obstacles and jumps from the arenas that is not realistic in the derby world.
-Make it so doors and hoods arent falling off that doesnt happen very often.
-Make it so the other cars dont target only you but is more of a hit who you see.
-Make upgrades for vehicles to engine. Stock, cam, heads, stroker, etc, along with customizing bumpers for stronger bumpers and car strength. Make it so bumpers dont fall off with upgrade option.
-Have full events, heats, grudge, main. Make repairs available between heat and main or heat and grudge. Make it to where can play online with friends and against friends.
-Customize cars with paint scheme and door numbers. Chrysler, Chevrolet, Ford cars as well.
-Get rid of truck.
Otherwise its an awesome game and I might even pay to play this one if you charged for it after some more adjustments.