Once you get past the initial confusion and the lackluster presentation, this is a really great and fun game. Unfortunately after you unlock large grids (when the game gets really fun) the limited window size in mobile/portrait orientation (maximum 640x960) is getting very annoying. The tiles and numbers get really small on your screen, as they automatically scale to fit inside the window.

Is there any way to change the window size and level generation to landscape orientation to use more screen real estate? Alternatively I could make do with a zoom so I can at least make the areas I'm working on more readable without eye strain. Mouse wheel does nothing as far as I can tell and I haven't found any other helpful way of interacting either.

I have previous builds which have zoom as well as landscape orientation.  I thought it best to target mobile so that is why I went with portrait.  All the work I did to try to appeal to the mobile market isn't really working (I don't have the time or resources to do much to push it forward), so eventually I plan on releasing a build that is more tailored more towards the pc market.  I'll be sure to let you know when I get that out and I'll upload the build here.  Looking back, I probably could have done better with a much earlier build that didn't try so hard.  Thanks for playing and for the feedback.

Oh no, I hope things work out for you in the end. I really like the idea of your game and I'm still playing a few levels almost every day :-)