Hero Tower Defense (sketchy)

A quick prototype for ideal incremental and endless tower defense game. Inspired by Warcraft 3 tower defense maps. This is a modest demo from me.

Hero and upgrade icons from game-icons.net.
Hero and rat models from quaternius.com.

• There are 2 types of heroes. Ranger and wizard. (I think icons are self explanatory)
• There are 2 types of upgrades. Increased attack rate and increased damage. (explosion icon is damage upgrade)
• Click an unoccupied white tile to place hero.
• To upgrade a hero click occupied tile.
• You earn N gold for killing a rat from Nth wave.
• After cleaning a wave. You gain exponentially increased amount of gold.
• Every monster has a speed of exponentially increased health and speed related to wave number.
• Upgrade prices are globally inflated. Each time you upgrade, price is increased for all heroes.