Just stick with the walkthroughs, cheating doesn't even have a point. With walkthroughs you still have to do the work. Besides Gemcraft is a fun game, so play it for the fun. A lot of people before me have already said this.
u can't pass a level? try to use different strategy, every.
1. don't use 3x speed frequently 2. no anger mode 3. patience 4. wrong tower position (very important) 5. put some trench in beginning, slow, mana, poison, repeat it later 6. put tower in beginning, middle and end, it will generate more mana and stand stronger with banishment. 7. better 3 towers with 2nd grade early than 2 towers with 3rd grade 8. 'supergemming' first, combine 2 different colours, then add 1st grade gems with the same colour. It will add range, damage, etc. I thought this 'supergemming' is a bug, but it works yay
9. try to defeat 3x XP mode first. 10. last thing, relax (^-^)