Thank you both for your time
I still have to do the final mix on all of these to get the levels of all the tracks in a similar ballpark. I will take into account your advice when I do that.
I will tone down the highs a bit in those sections. It's always tempting to make a mix brighter and brighter, but you're right, when I do A/B comparisons, those parts are pretty shrill. Not sure why I didn't notice that.
About the kick drums, you are probably right. I often have a tendency to overemphasize them. It's a personal weak point of mine. I used to listen to a lot of drum and bass, where either the kick or the snare is the most prominent part of a track. They should probably be a little more in the background here since they'd probably be interfering with the game sound effects too much too.
And Usta, cool, do you have anything for the project online?