Enemies

Enemies have a different amount of health, speed, and properties. They give a different amount of experience and coins for destruction. Most non-boss enemies deal 1 point of damage to the base.

Different towers are differently effective against different types of enemies. Enemies appear in the game as you open new levels.

Name	Icon	First appears on level	Features
Regular		0.1/1.1	n/a
Fast		1.5	moves faster than a Regular but has a little less health, slowed by Poison, can spawn with Light
Strong		1.1	moves a little slower than a Regular but has more health, weak to bullets (i.e. from Sniper)
Heli		2.2	moves by air, most towers can't target it, only spawns in clusters
Jet		2.8	moves by air but faster and with less health, immune to Freezing, never spawns in clusters
Armored		3.2	movement speed based on wave, reduces damage taken from enemies within 1.5 tiles of itself (but not itself) by half (effect does not stack), immune to electric-based attacks, never spawns in clusters
Healer		3.6	restores 5% of health of enemies (but not more than 5% of its own health) within 1.5 tiles of itself (but not itself), immune to fire, never spawns in clusters
Toxic		4.3	restores 3% of max health if it did not take damage in the past 3 in-game seconds, immune to poison, can spawn with Icy
Icy		4.7	has a shield (25% of max health) that prevents movement speed debuffs and reduces damage from non-bullet and non-fire projectiles, has a 50% chance to deal damage to the base, almost exclusively spawns in clusters
Fighter		3.b1/5.2	divides into 3 copies of itself upon death, deals 2 damage to the base, has a 50% chance to deal 1 with copies, never spawns in clusters or with Healer (reasons unknown)
Light		4.b1/5.6	gains resistance to the last TYPE of projectile that hit it for 6 seconds (but not more than once every 10)

You can meet bosses at the last level of each storyline stage (1-5).