I found the game to be fairly intuitive and approachable-- which is an often overlooked trait in strategy games despite how important it is to the overall experience. The basic concept of the game was also quite fun, but fundamentally Plexago has the same flaw as any e-board game which is the AI can never provide a satisfyingly robust challenge. After about 6-7 times of playing the plexigod I pretty much found out it's basic strategy and how to beat it. Without an online versus option the game can hardly be called complete.
Other than that, a few small gripes: the tutorial would loop if you hit the continue button again and I couldn't figure out how to exit in the middle of it. Locked tiles are a little difficult to distinguish from live tiles. Also, the utility of the text seems to have been a secondary consideration-- a lot of the buttons and text are not as obvious as I believe they could (should?) be.