Not bad
Nice little game, you have a great base here.
For the sequal, if there is a sequal, there are some ablities that should make it to the next game and somethings need to be fixed.
Good:
Upgrades ablities
Diversity of bots
Sound
Over all game play
Needs to be fixed:
AI (just builds to preset enemy base, upgrades, then stops)
Rains too much
Endurance mode (needs to be much harder)
To be considered:
Stringing factories together;
example: you have a green smoke factory but then string it through a mage factory-> end result a regenerating box bot.
Overall a good game but could be better, look forward to a sequal