First time I played I only got up to level 3. Then, I came back and played the game until level 7 or 8. When I opened the game today, my save file had only levels 1 and 2 cleared :/
That's probably one of the most awesome games so far. The concept is just great. What Enthernalcz said is true though... switching specimens would make it so much easier. The game is kinda long and a little repetitive, so it's kind of boring doing it in a single run, but it's nice to take a break and spend a few minutes here.
great game but it should have an easier way to build multiple things and to promote employees. A management screen or a click-and-drag function to select an area would probably be really useful
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 "The King of Towers"){kind=icon}
 "Mighty Knight"){kind=icon}
 "Lab of the Dead"){kind=icon}
 "Cardian"){kind=icon}
 "Corporation Inc."){kind=icon}
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