I do enjoy the presentation and it's a very peculiar way to utilize the limitation.  

• Heat is our source of health and we spend it to implement more defenses as each wave gets more grueling.  

• A very good way to utilize the Autumn aesthetic, and it helps our enemies the "Frost" to pop out as well. 
• A very fun take on a tower defense!

Furthermore, you are punished if you stay outside your fire for too long -- but you have to collect resources quickly to grow your fire more. Very good risk and reward!

• The only downside (that doesn't kill the game, but it does get tedious) is the clutter that placing many defenses creates. 
• When there's so many pieces, its hard to tell and plan which defenses should go where.
• Leaves, flames and at times enemies blend into each other. (Perhaps skill issue on my part.)
• Maybe item placement should be more forgiving, or existing ones should have been able to be upgraded.

Love the game and the aesthetic. Love the idea. 

Amazing art style, music and visuals! I don't like roguelikes much, but this game is pretty good 

Very difficult, but fun!

The game sent my laptop into a 3-minute depression at the loading screen :p