i like this, the graphics are nice, there are basically no lags and the atmosphere is great. There are still a few things that i hope will be changed: lets get the elephant out of the room and its everyone's favorite tombstones (sarcasm), now you see these things are way too easy to get stuck on, the only times i got out of them was when the ghosts pushed me outta there. 2nd I would say is the wave cap like i know there aren't infinite humans but in perspective there were like 100 000 of em, i think infinite game would be nice, and how to do that? after every 100 waves make every ghost have 2x the health. 3rd is the lack of difficulty i mean as in modes but the gameplay kinda too its a little too easy to avoid the ghosts, and i know this is an alpha so i didnt really expect any game modes but it would be cool to have like easy normal hard and fast in which the ghosts speed at you. i played the entire game (all paths) and well i think implementing a multiplayer mode could be an option (just maybe a bigger map) and the money could be shared like this (im saying if there were 2 players) 1st ghost gives money to the 1st player and the second to the second player and repeat like that. and the 5th thing i kinda thought could be a nice detail is about the mastermind i think he should have some interactions with the ufo and perhaps at the last upgrade (of the up path) the robot should kinda fuse with the ufo, by that i mean the ufo goes upside down and kinda sticks in its head. and maybe the other paths could work. And the last one is abilities just for 1 path like bomber a nuke, master mind boosts everything (but the ghosts) electro stuns all of em and maybe the soldier just becomes a laser that pierces through everything. welp thats all i really have to say.