Auto GUI Battler

A single player only PvE autobattler that is purely GUI (graphical user inteface). Manage dealt cards (units). Combine units to level them up. Upgrade items.
Survive 50 randomized rounds that are highly replayable. No synergy system, no other maps/campaigns, no meta-progression.
How much content there is
Around 90+ different units, 60+ different enemies, and around 30 items. Enemies are placed on the board in various randomized configurations. There are also a variety of skills and status effects.
There are additional difficulty modes such as instant-death and nightmare mode to provide more challenge for veteran players.
Gameplay
(The demo ends at 36 rounds rather than the full 50 rounds)
The game consists of 50 rounds, each lasting 50 seconds. Every 5 rounds, the game automatically saves to provide a checkpoint. Additionally, items are dispensed every 5 rounds.
Combine 3 units of the same name and level to level up the unit. Max level is 3.

No Metaprogression
No metaprogression so that players can jump in and play without thinking. 
Fast-forward Feature
Can speed up battles from 3X to 5X the speed.
Highly Optimized
Playable on lower end computers.