Linezeta
It's a nice robot/space game that only really takes time and not much strategy or skill to play. Other than a somewhat fast finger to line up cores. You get blue, red, green, yellow, and black robots you can mix and match to attack with by lining up 2+ same colored cores. My favorite style of gameplay was to get a leader with +1.5 or higher attack bonus for Blue Zetas and have a full team of blue + a friend blue leader that had + attack damage for either blue Zetas or all Zetas. Then I would proceed to wreck house with my blues, since blue is my favorite color. They've added new Zetas that are a little more humanoid too so you can get a busty girl with a few robot parts/wings. A couple of times I couldn't attack when I was unfortunate enough to not get any blues lined up but for the most part I do alright. Strategy only really starts to come in when it takes 10+ turns to kill the final boss of a stage. Then you need to choose when you want to use your ultimates, your ships ultimate (which you must remember you have, I didn't realize how to use it for so very very long) and if you can survive a hit you need to heal back as much as you can as fast as you can. That's when having something like a "convert x core to a heal core" Zeta Ultimate can be handy. Or something like "convert red cores to blue cores" Man I think I chained almost a whole screen together one time I was converting multiple types into blue and then just let it unleash. Wish I had the pressence of mind to screen cap it.