It took me several tries to understand how to play. I read the game page which explained I should start out buying banks, but I didn't know where the banks were, because I didn't notice the scroll bar on the home planet's UI. I did eventually manage to comprehend the game and even won, though a few things remained unclear.
When my units went up to attack the enemy, they seemed to take up positions and shoot... off to the side of the planet. Is that where the gate they're intending to destroy is? But after a bit the ships would reposition, or turn into missiles or something and that's when the enemy's health seemed to go down.
I also wasn't sure if it was better to send ships out the moment they could be built or to amass resources and build up as large of an attack force as I could muster. The game page says they intercept enemy ships on their way, so I'm guessing pumping out units quickly is the better strat. At a certain point the home planet stopped seeing attacks at all, even when my unit numbers were low, possibly they were still intercepting the enemy in those cases? It all remained pretty unclear to me.
All that said, I like the concept and I did give the game enough attempts to be able to achieve success so please don't think I'm taking a negative view of it. :) I'm just having difficulty understanding the intricacies from what I see on screen and applying what the 'How to play' section to that.