Well, it looks like coma, but this would mean that the scope has a cemented doublet. If it were air spaced, it would not have coma.
Now, if it is air spaced, even if the lens were tilted, it should not show as coma. If one sees coma, in an air spaced lens, it would usually indicate that the lenses are tilted with respect to one another (not seated against the spacers).
Here are things to try.
#1 And most likely. The focuser is tilted with respect to the tube. Very common on cheap refractors. Just rack the focuser all the way out and look down the tube from a couple of feet away. Position your eye so that the end of the focuser nearest you and the end of the focuser furthers from you are centered, and then see move closer or further while watching the outside edge of the lens cell and ensure that the tube is not tilted. Better to use a laser.
#2 The lens cell is tilted, or the lenses inside the cell are tilted. Easiest thing to do for this (assuming there is a retaining ring on the lens cell) is to back off the retaining ring and shake the cell from side to side to settle the lenses in the cell.
My money is on #1 though. I have seen at least half a dozen inexpensive refractors (and one very expensive one) that had tilted focusers.