Hello! Thank you so much for playing our game and for the feedback!
In the latest build, we addressed the scaling issue and added the Grid, so we hope that helps visualize things.
As for the rest:
- Walls: I tried to make the AI a simple as possible, and I will be looking at an enemy that follows an A* pathing algorithm (that won't lag the game)
- Health: We are trying to see the best way to display damage (either a health bar or a showing a damaged sprite)
- Towers: The Mana used to Create towers is infinite, but it's strength deteriorates when used. Once the mana is corrupted by the machines, it does not directly return to the "mana pool". Thus an incantation (the upgrade button next to the tower selection button) must be done in order to restore the strength. Adding a tutorial might help fix confusion on this part in the future.
- Countdown: Big Warning sign appears and a siren signaling the next wave should fix this. Adding a button that spawns them anyway for extra points might be interesting too. (right now its set to spawn 100 every 30 seconds, cause it was easy at the time lol)