Better size picture man! Also try to scratch some paint off those mountains so yo give them a different texture that planets. Also I would add a bit more texture to the rocks in between the falls. But great colours!

The water surface looks good here. The waterfalls need alittle practice. It appears that you may have tried to work them too much in turn mixing the paint. Try to keep the number of movments you perform on the waterfall to a minimum and the paint streaky.