yea man, i mean, ive got a sound reference thats got a lot of 6"s and 4"s and piezo tweeters, and a 15" for a sub...i think the guitars coulda been louder in the mix, but one thing thats helped me out when recording guitars and chips is to really stack as much 1-4k midrange on em as possible. it takes a little of the need for distortion in the gain stage which can help in recording to a computer and makes it pop more.
chiptune stuff is probably the hardest electronic stuff to mix guitars with, because when you have stuff thats really dynamic frequencywise, a lotta times with chips, you are best off maybe halving the volumes of those higher notes to sort of manually pad or compress the dynamics. not a ton, not always halving either. a good example of this working against the music is the way if you were to take a sample and play it at ridiculously high hz, you'd hear those undertones or semitones of notes in there with whatever you were trying to hit, if it was like a c that was 8 octaves or 10 octaves up in those super high registers, you'd usually hear the other note louder. i think across the board, when you're using sinewaves that it reacts this way unless you're interpolating the sound. so because of music being really dynamic naturally with higher and lower notes, when you have an instrument like a guitar that you strum instead of really hitting, a percussive instrument with a more consistent register sonically, the note comes through, but sometimes it will lack the definition because its sort of the same idea, you've got a note that naturally decays but if you dont have the right amount of midrange on it, then those higher parts wont cut through.
i hope what i said makes sense and doesnt sound like im critiquing, its definitely not that. your friend said you're in another band and this is more of your sideproject and of course i dont know how you went about recording the guitars. but its certainly enjoyable for me, i sort of feel like i can crank it tho and the guitars arent coming up. if you ever want to talk about recording and guitar stuff feel free to hit me up on irc. i can send you some tss stuff i've done over the years and we can get into some tricks for recording if you got more stuff in the pipe and want some assistance.