2 + 3 = 5 Stars!

Very enjoyable game with a clean and intuitive UI. No pesky pop ups asking for more money, just a fun game with enough of an intellectual edge to ensure the time spent on it is useful rather than wasted. This takes many of the wonderful things about Threes (presentation, replayability etc.) and applies them to a completely different style of puzzle. Would love if more games took this kind of care with their implementations.

Arkcann about GREG - A Mathematical Puzzle Game To Train Your Brain Skills, v1.0.1