Thanks for playing!
The early game balance might be a bit off. There are health pickups in the game (not sure if you saw them), but they have a random chance of appearing each wave until the much later waves. More health pickups would also incentivise using the teleport ability more.
It's actually possible to trick the snakes to hit the walls without losing any health yourself - which is what I mostly designed the balance around. I now realize that I didn't make that clear enough.
I will try your game next!