Terrain is better. Some egg sack is nice. Spiders dont stack anymore

Minigame is good idea, BUT:
-Reloading when hero die???
-Spider spawn is very simple. Spawn at random time will be nice.
Also spiders can have diferent speed. Like small spiders run faster or red spiders run even more faster XD
-Explosions are good idea but spawn more

like 1-5 or something. Use loops.