I would love to have somewhere outside the puzzle grid to put pieces so I could get a look at what I've got so far without the extra pieces confusing it, but that's the only thing I have bad to say about the game. Good work!
Boring. I beat it on normal first try without using any items with an IQ of 135. Now, yes, I could go to a higher difficulty, but that would make it harder, not less boring. Multiple choice arithmetic is boring. You only have to find the ones digit most of the time.
The controls are nonstandard and take some getting used to, but I didn't think they were annoying or in need of a fix. Once you get past the phase where you want it to handle like snake, it's smooth sailing.
If you get the glitch where the robots that teleport in freeze, you can kill that robot with the explosions of other dying robots. Maybe with explosive weapons too, but I didn't have any.
Good artwork, but a literally impossible difficulty level makes it a total bust. If you cannot read that author's mind or spare the time to check every single pixel for, be prepared to use a walkthrough. I am not exaggerating. There are thing in this game that are difficult to find even with the aid of a walkthrough.