Hey, great submission! Some feedback:
1) The building's rising animation, while providing nice and unique visual, creates problem for selecting a building.
2) There are no music and sound volume controls.
3) The art is nice, chromatic aberration gives a nice polished feeling.
4) Could use a better tutorial, integrated into gameplay. And a pause and exit button.
5) Needs a key modificator for adding/subtracting 10/5 at the same time, like shift or ctrl.
6) Repair all button or/and an upgrade for automatic repair.
7) Speaking of repair, since you can't see building's HP at all times, acid rain time becomes click-all-buildings time even with visual cue that building is being damaged since the damage is big on early levels.