Thank you for your comment. I'm glad you had fun.
Did you try to send waves early by pressing the next wave button to increase pace?
(That feature is not so obvious. I should probably improve that.)
I did see that. The problem is that the black tanks come slowly and if you send too many waves while the black tanks it can easily overwhelm, but the black tank waves take very long.
Some more feedback: Railguns are OP, their actual DPS because of their AOE is way more than any other tower. With only railguns and good placement, you can basically rush the first waves until you get black tanks. Basically, 6 railguns will solo the first 50 waves excepting black tanks. For black tanks, you just put some double cannons after the railguns clear the AOE. But you can't rush the black tanks because the double cannon spin up time means that if a single tank gets by, all the double cannons DPS will be significantly lower.
More feedback:
Basic tower is pure garbage. Never used. Their needs to be levesl with significant financial issues to ever consider it. I'd halve its cost.
Artillery is good in theory, but has much smaller AOE than a well placed railgun, which does all the AOE you need. Artillery should be buffed AOE.
Walls are too expensive, should be half as expensive, better to just spam whatever tower you have invested your points into.
And the slowing tower is kinda bad because of how expensive it is. You get more DPS by just spamming towers than trying to strategically slow.
I would significantly buff the railgun range, but also significantly nerf the damage to try to balance it so it isn't so OP. As it is, its too easy to just spam because it can clear everything besides black tanks.
Also, my impression is that the 3x speed button affects tower performance. Many TD games have this problem. I think the AOE towers (especially artillery) actual DPS is lower at 3x, probably due to lag causing tanks to not take AOE damage. Could just be in my head though.