StarGem Defense (demo)

StarGem Defense is an addictive and challenging Tower Defense game featuring mazing, a large map, and 60 towers that may be further combined into new more powerful towers.
It combines luck with strategy to create a uniquely fun game that will have you wanting to improve on your strategy each time you play.
Full Game Manual: http://www.stargemdefense.com/game-manual.html
Each round dig up 5 gem towers and select 1 to keep.
The remaining 4 gems become rocks which form the maze monsters will travel. Gems you find may be combined into new powerful special gem towers. Special gem towers come with a host of new abilities and greatly enhanced damage.
To master the game you'll need to keep monsters near your towers as much as possible!
Use the maze and abilities wisely!
Monsters emerge from the portal.
As they follow your maze, use your arsenal of towers, special abilities, buffs, spells, and status effects to protect the Star Babies at any cost!
Compete for the top score on the top score page.
Visit the forum and show off your maze or see some of the other strategies people are using.
The game is continually updated (PC and Android) so check back often!
It's 100 percent ad free and doesn't have in game purchases.
This is the free demo version and ends at level 50.
Official Website:
http://StarGemDefense.com