Cursed Treasure: Don't Touch My Gems!

Protect your gems from being stolen by “good” heroes in this tower defense game. Music by Oleg Stepuro.

Gameplay
The object of the game is to prevent the enemies from taking your gems. The enemies has to pick up a gem and carry it back to the exit for the player to lose the gem. The player only needs one gem to remain on the screen in order to win a level, but in order to achieve a Brilliant rating on a level the monsters cannot touch any of the gems. There are two resources for the player to spend, gold and mana. The player gains gold from killing enemies and it is spent on building towers and upgrading them. Mana is gained automatically over time and it is used for casting spells.

There are three types of towers, Dens, Crypts and Temples. Each of them can only be built on one type of tile which means that the mission map determines what towers you can build where. Dens can only be built on Grass tiles, Crypts can only be built on Snow tiles and Temples can only be built on Rock tiles. Towers gain xp from killing enemies. Once a tower has enough xp to level up, the player can spend gold on leveling up that tower. On a tower's third level upgrade, the player can choose which upgrade path that tower should take. Each tower type can upgrade to two different kinds of towers.

There are three available spells. The Cut Out spell removes forest on a single tile so towers can be built on that tile, the Frenzy spell increases the Fire rate of all towers for five seconds and the Meteor spell causes damage to a selected area.

Skills
Beating levels award the player with xp and with enough xp the player gains a level. For each level, the player gains 3 skill points to level up skills. Upgrades are divided into three categories, Orcs, Undead and Demons. Most skills can be upgraded to level 5. Levels can be repeated to gain additional xp.

Orcs
For each skill point spent on Orc upgrades, all towers gain +1% Fire Rate.
 * Gold Vault - More gold in the beginning of a mission
 * Height Advantage - Towers on high ground cause more damage
 * Mining - +1 Gem in a mission
 * Cut Out Study - Cut Out spell cost less mana
 * Cut Out Mastery - Gives gold when you cut out a forest
 * Marksmanship - Orcish Den and Hunter's Den has a higher chance of causing critical hit
 * Bounty Hunting - More gold for destroying enemies
 * Warchief - Less upgrade cost of Dens, Dens gain more experience
 * Poison Mastery - Adds Poison Cloud to Dens

Undead
For each skill point spent on Undead upgrades, all towers gain +1% Range.
 * Mana Stock - More mana in the beginning of a mission
 * Mana Pool - More maximum mana
 * Soul Vault - +1 charge for Crypts
 * Frenzy Study - Frenzy spell cost less mana
 * Frenzy Mastery - Higher fire rate for towers when Frenzy is active
 * Mind Control - Chilling Crypt and Fearful Crypt has a higher chance of causing fear
 * Mana Extraction - Higher mana regeneration rate
 * Lich King - Less upgrade cost of Crypts, Crypts gain more experience
 * Ice Mastery - Adds Freeze to Crypts

Demons
For each skill point spent on Demon upgrades, all towers gain +1% Damage.
 * Basic Training - Towers gain more experience
 * Scorching Treasure - Enemy lose HP while carrying a gem
 * Adoration - +20 mana when you build a temple
 * Meteor Study - Meteor spell cost less mana
 * Meteor Mastery - Higher damage of Meteor spell
 * All-seeing Eye - Evileye Temple and Beholder's Temple gains more Radiance
 * Return Portal - Returns gems lying on the ground to the cave
 * Demon Lord - Less upgrade cost of Temples, Temples gain more experience
 * Fire Mastery - Adds Blaze to Temples