this is the most experimental ost i seen in this jam, its good in that aspect but in the others it lacks a lot.
. it needs in most of the recording some sort of rhythm instrument, you could have make it with another guitar taping or doing smt to keep the songs firm
. learn about double tracking, it gives your recorded instruments a lot more depth
. learn reaper, just that
. better song structures could help
there are some other things like fade in/out to end, begin and make songs loopable, better mixing, etc
i hope this helps.