very very well made game. i completed it and only 1 level (the one with alot of cactuses). very good job!
Thanks for playing! Glad you enjoyed it.
As for the cactus level, the level design maybe could've been a little better. The idea was to remember that the tutorial mentioned only needing half of the aliens to survive, so you would intentionally use 2 of them to dispose of 2 cactuses