Okay, first of all who finds this game hard to level up on? Second, I think DuckLife 3 was better because you leveled up faster, could choose a different stat boost depending on your duck, and you could buy the stat boosting feed. Personally, this game would be amazing if it is easier to level up on.
Cool game in all but it has some issues. First of all, it is short with x3 on. Second, the units get max experience fast. Third, all of the heroes have the same campaign. Otherwise good, 4/5.
All you haters out there need to stop making comments about how bad the game is because it has energy. Maybe if you didn't sit and play games all day you wouldn't care.
A good game but it has two issues. The first is that you have to wait for days to regenerate and that you can only store six days unless you buy a starter pack which leads up to the next issue. I hate games that you have to pay real money to get almost necessary items, I mean who doesn't? Instead that could easily be resolved by putting in advertisements at the loading screen. Maybe even in between days! I'm pretty sure that this game would make a lot more money that way. If this game didn't have those issues, which I said how to resolve earlier in this comment, I could play this game all day.
I like the concept but the game could use some improvements. One thing that needs to be fixed is the fact that you can beat the game with one unit. I mean, come on that makes it to easy. Make a need for support units and traps and so on. Another thing is the buildings. They just sit there doing nothing until all of the humans are gone then they get destroyed. That makes the game more boring because it just wastes time. The speed up button was nice but can you add a 3x speed up please. The last two things that could be fixed involve the egg-laying alien. It has claws but for what? They aren't used to attack people. The egg-laying alien is like the base of the invasion so why don't the humans attack it. So, any way I think the game was okay and look forward to seeing a sequel but the game must be improved.