Add concept idea

concept.txt

+- Game Target: Kill Auto Hero
+- Auto Hero
+    - Automatically runs to next enemy and bashes away
+    - Stats increase with every lost battle
+- Mana
+    - Player has limited mana available
+    - Used to spawn enemies
+    - Used to upgrade enemies
+    - Gain mana by dealing Damage to Auto Hero or defeating him
+    - Can be spent on permanent upgrades
+    - Persists after battle rounds
+- Enemies
+    - Multiple Types
+    - Close combat, weak
+    - Tank
+    - Far Archer / Mage
+    - Drag-n-drop enemies into game
+    - Enemies stay at their spawned position
+- Upgrades
+    - HP
+    - Deal more damage
+    - Take less damage
+    - Reduced Mana Costs
+    - One-time use extreme buffs to put on a specific enemy
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