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I liked this game even though it was like Balloon in a wasteland it was still fun. Only thing i hated was the flying guys.

like "baloon in the wasterland"

The game's quite allright - and well, I'd give nay much attention to people saying it's a copycat game.

After all, there are gazillion copies of sorta-like-mariobros and I see ho haters hatin' them.

basically a carbon copy of the game where you're trying to grow a tree that turns on you at the end.

also, having to go around collecting money was pointless and annoying.

having the money despawn fairly quickly was pointless and annoying.

the saddest part is that in order to make your game distinct from th eone you copied, you had less features..

1 star for not being bug ridden
1 star for being polished

It's a decent game, but it feels slightly mindless and a little repetitive. I feel there's room for polishing and adding more variety into this game. For example, we're talking about aliens here and alien technology. What i suggest is that you add monsters who are more resistant to one type of gun and weak against another thereby giving a reason to buy all of the guns instead of buying one and never using it again. Like machinegun not being able to penetrate the hard carapace of some aliens and therefore need to use the more precise purple gun. Or some monsters being straight out unable to be killed from the front so you have to double jump over them.
While there does seem to be a couple of different types of monsters, they essentially don't have much of a difference. One attacks just by running into you and the other attacks by floating into you. The only special case being the one with the gun. The only difference really is that one ground unit has more or less health than the other. Again, we're talking about aliens so there's room for a lot more creativity! like a monster on a pogo stick that can hop so high that they go out o the map and come back down to hit you or a teleporting monster or a underground worm monster that pops out of the ground underneath you to attack and gives a red sign before coming out from the ground and into the sky then going down into the earth again.
Boss rounds every 10 or so waves would be a nice plus. I got really excited that i was able to get double jump but ended up not using it at all since i really didnt need it. Make like a fast moving portal gun boss or a stationary boss that shoots large missiles that you can double jump and platform on.
Support items like unique weapons that appear every so often on the map would also make the game more appealing.
I think i said everything i wanted to. Overall, it's a decent game. I'll give a 4 for the music, gameplay, mechanics, art, and (probably) hard work.