On zerostar if you have teleport at the place where you have to hit the green boxes then tele past the mines... if u can go under a mine jump and tele at same time and u will go down a floor thus giving u a huge advantage
lvl 4 easy!!! not rly but it is possible i beat on first try
1. Get the Death Knight
2. Only Get the Goblin upgrades
3. MASS Goblins near your place, even on the path
4. To make easier set all the goblin's radius go to the same point (( doesn't matter if its on the other bad guys ))
5. Make 2 Cenutaurs on the right a left sides
6. Dig out the 4 nearest dirt things from your base
7. out 4 more cenutars there
8. Keep hero alive
9. If some goblins spawns die make more!
On level 4 this is how I beat it... First choose Death Knight... the goblin upgrades ( left )... make bunch of goblins near your building and around... pause... make their attack area the same... keep spamming goblins and later on make a bunch of archers on the side... ONLY GOBLINS... sounds noobish but it helps
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