
It's a tough game, and the difficulty ramps up rather quickly. The worst are the Cobra ships, especially in "red zones" where the game reverses the controls. To add insult to injury, the Cobra ships are only worth 30 points apiece, which is really low. The only upside to them is that they apparently are incapable of attacking base planets.
Solaris is a really ambitious game and was a great swan song for the 2600. I'm glad they finally put it on a home collection. The author, Doug Neubauer, made sure he retained the rights to the game in his agreement with Atari, so he actually owns his creation and that's why it doesn't show up in a loot of Atari collections.