it matches the theme, nice art, music and sound, it's just like any other clickers games, addicting, although it needs more content other than drag and click maybe some tombstone that takes up space and you need a certain evolution of boss to destroy it, cause the only way to get game over is to not have enough space which is VERY rare, or a human that harm nearby boss and have to move them elsewhere, making use of the fact you can move bosses rather than evolving them, other than that clicking and dragging sometimes work sometimes don't, (FYI: fullscreens allows me to see the congrats and game over panel XD)
good game :D