1st track sounds a little mis placed its like you scared to put the instruments in there i keep waiting for the build up to get somwhere but it never arives, bring all the sounds in and let them play at once. you poking them in and out makes it sound hollow.
2ndtrack same as above
3rd track now this is more like it more going on at once in the mix now it just dropped out. You need some better sounds but good try keep at it.
this is just my opinion so dont take it to heart. you on the right track