The mechanics of this game (as in, what nuclearoid does what, how they move, how they affect each other and what causes them to explode) should be better explained IMO - the description is too vague and I didn't see a Help section anywhere. Yes, I did get it at some point after playing a while, but I think an explanation would have been better. Also, chain reaction games NEED a counter. All that said, these games are usually more luck than skill, so even if it was perfect I doubt it would rate very high. Personally, I give it 3 stars.
It isn't just the same concept as The Company of Myself and Chronotron, some level ideas are the same as well... I remember the steps from The Company of Myself where you had to jump where the step would be while you were on the ground so your clone would climb the steps... I haven't played to the end yet though, maybe it gets better.
I'm about half way through, so far I've noticed that certain levels need excruciatingly precise timing. If this keeps up, I don't think I'll be playing much longer. This is the only major fault I find with the game. Also, R for restart please.
Question no.20: Trombone, violin, guitar, piano. Difference: Playing style. They're all very very different: The first one is the only one where you have to use your mouth, the second one is the only one where you have to use a bow, the fourth one is the only one where you have to use your feet. What am I supposed to pick?
Question no. 5: 1) chest of MONEY (as far as I can see - although there seems to be something red in there as well), 2) pile of MONEY in coins, 3) pile of MONEY in bills, 4) two gems (NOT MONEY last time I checked)... and the peculiar one was supposed to be the bills?
I see that you have defined "right" and "left" rows according to their position on the playscreen, not relative to their original position. As a result, the overall shape changes whenever they go down one row. I don't like that. Still, 4 stars for a good remake of a classic arcade game.
 "The Light Temple"){kind=icon}
 "Nuclearoids"){kind=icon}
 "Forest of Echoes"){kind=icon}
 "Rolling Fall"){kind=icon}
 "Lucky Tower"){kind=icon}
 "Potion of Beauty"){kind=icon}
 "The Extremely Hard Quiz"){kind=icon}
 "Identify Peculiar 2"){kind=icon}
 "Bubble Hit Halloween"){kind=icon}