So this was one I played during the early 2010's and I haven't played or looked for it in such a long time.
So the very little I remember was that it had less then 10 levels and was a plat-former style 2D game, and it consisted of this alien/robot that fell off its mother-ship and ended up fighting against its kind, and it consisted of different levels where you would take different forms, one took place underwater and you took the form of a submarine or boat and had to navigate the level. I don't remember much more than this as I was never able to get past the 3rd level I think, but it was an online game, but other that than I don't remember anything else.
IF you can help thanks,
10to21