If this was an actual build from June 2005, I'm really surprised how much work they managed to to do in like 2 - 3 months. Especially considering major mechanics of the franchise, like HOPOS and star power, must've been late additions to the game. I guess that also explains why HOPOS ended up so busted in the retail version -- they literally only had a few weeks to figure it out and tune it while somebody had to be skilled enough to do expert playtests.
The rock meter seems to not work, idk what the star power is doing, and the point system is confusing. But i do like the highway burning off at the end of a song.