Round 50 achieved!
Top row is level 3, everything else is level two (except for the useless electric peg)
It was around round 35 that I realized you can just keep getting more health, it doesn't cap at 100.
With this overpowered build, you take around 50-100 damage each round but gain over 1000 coins usually, which is enough to heal you past what your previous round's health was.
Probably going to stop here, although the build could theoretically go to round 100 and past. There are so many orbs and effects that my computer is slowing down significantly, another reason why having orbs do special effects instead of flooding the screen with more orbs to make rounds harder would be better.
Anyways, hope this insane build is nerfed, and more stuff is added to make future rounds harder.
One last idea: the majority of the orbs that are getting through are from the sides. Is it possible to have some special slots for pegs closer to where the walls are, perhaps ones that have to be bought or unlocked?
Really enjoyed this game, hope it gets updated more.