Interesting take on a tower defense game! Building your own lane is a cool concept I'd very much like to see being expanded upon
There just seems to be an issue with positive feedback loops, because if you don't kill enemies fast enough, you don't make enough money, which means that surviving enemies are a greater threat to you, which means that you have to kill them with even more efficiency but you can't do that because you're not earning any money. Maybe that's just my inexperience with strategy games but I had the impression that once I didn't have enough money to buy more towers/space, it'd just be an inevitable matter of time until I lost.
Visually, some more work for the enemies would have been nice to see them get progressively more dangerous and projectiles or visual raycasts for the turrets to see where weakpoints in the lane coverage are but it's a solid enough foundation to be enjoyable nonetheless!
Conceptually, it's a cool game, I just wish it had more polish haha
(Written by Snek of SFG :3)