I like these simple little pieces of yours. The only thing I feel is off are the stars. The trick to doing stars and getting depth is a build up of lights. First put a base of lstars clustered around either in dark grey or have the opacity and flow waaaay low to almost nothing, then add brighter stars, and brighter still lessening the amount of stars, then finally only a few really bright stars so they don't overwhelm. I hope you just take this as a suggestion, you don't have to do it.