PS Actually one can have more squares than limited by Zoom 18, only a little bit more but fairly useful. If anyone hasn't discovered that, hope this hint will help.
OK here's a good news about you-know-what. The developer does have hidden a surprise in tier 6, and I think the time to "discover" it may be reasonable (not too far after 1100+ SP). However, it definitely needs a lot of playing hours to actually reach that point. Take your time and enjoy :)
Further suggestions for the developer: Doing some mathematics will reveal the current problem. The zoom limit will determine how much pixels you can get at most with every collection, and your maximum collecting efficiency is restricted by auto-collect refreshing. (100 times per second is an optimistic estimation.) If you multiply them you get the approximated actual px/s you receive (other factors are minor). Comparing it to the pixels required to get every skill point, you can see that the time to obtain a skill point will soon be unacceptable: you may spend 10^5 seconds (about a day) on the game only to get a single skill point, which is way too few compared to your upgrading cost and updating frequency. I don't know if there are any technical issues with this problem, but it suggests that you can do something if you don't want to make the late game too dull. BTW thanks for your dedications!
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It should be noticed that even if you have enough upgrades and hacks to obtain reasonable income for skill points, the limitation of 'zoom wall’ will ultimately restrict the actual income you get. When the square is always filled full in the late game, you simply can't collect that much of the produced pixels, limited either by your clicking speed or by auto-collect refreshing, and the effect of other boosts are wasted. So the zooming design is really necessary to be improved. The changes in other fields won't work at all without fixing this problem.
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