Its quite good. Very challenging. I'm not a fan of shift to fire though, and it could do with a story. I'm not sure why i'm wielding a laser gun shooting shpere-like things. But that's really my only complaints
While i'm all in favour of a sequel. This just seems too...commercial. Prius edition?! And it seems too preachy if you know what I mean. Efficiency meter? I don't care about efficiency, I just want to get my thing to the goal!