Very good guitaring except for a few of the solo parts which lacked feel and volume but I'll blame the mix for the volume issue. The voice just isn't there, though. Perhaps when he ages. But in the meantime, for live gigs, I suggest getting a more mature singer so that you guys can develop further as live acts and improve on your performance and guitaring.
In the 'background', ie. bedroom, work on the voice until it's ripe and matured. It falls very short of acceptability and ironically, it juts out even more because you are both quite good guitarists.
Cheers
RoRK