For ths painting, I brought the objects in closer and I added a sunset in the middle to fill up the space. I also added a little min-bar to the right to give the painting some interest and life. Plus I added more details and I added more contrast to punch up the sunset.
The original painting you had lacked hiearchy, so I adjusted the perpsective to bring the blue pods with the guy climbing up the ladded to the foreground. I also pushed back the green glowy light to added some depth.
These are just some really quick revsions I'd make. I hope these help.
