ok lets great game, has alot of potential if you wanna work on it.
The AP buff is pretty useless considering it one shots the big birds regardless
- i would change it to give it penetration.
The HE buff has the same problem, its only useful vs the small birds which is fine. but the damage again dont matter.
-my thought was change it to were either has a larger blast radius or it becomes a flak cannon, a lingering aoe that does DOT damage for 2 secs.
the backpack buff should just be removed, you never need it and it can be replaced with something else, infact it was the last upgrade i grapped.
-maybe replace with a rate of fire.
train health buff is not even needed and it fills lacking
-i would make it reduce damage, reasons why cause bird damage needs to be increased.
AP - TNT - motors - should have a very small chance of spawning inside the warehouses
Birds:
BOSSES - it dont have to be bird related - or could be a mutated bird or something idk.
kamikaze birds, either need to be more of them or make them more threating, 10 damage i feel is not enough
small birds - maybe a little fast flying down but at a good spot
big birds - little more health but also in a good spot
new idea - give the little man health bar and weapons - to introduce infected birds - which drop infected eggs or a parasite which can invade the inside of the train if the infected bird is not killed before reaching train.
regardless of what you do it a good game.