Just a couple pointers but I think you definitely need to focus on a couple things for next time. 1 being that you need to put a lot more variety into each track.
Think about the OG Super Mario Bros theme. The whole theme is essentially about 1:14 but there are at least four parts (A theme, B Theme, C and D) to that one track. Especially with videogame music you don't want it to appear to be too repetitive because that music of course is going to have to loop a lot.
So just to keep it simple, while you want it to loop you'll want to have some variations (Add a beat, add another layer). Find some way to change it up to keep it interesting! Hope this helps for next time! :)