Tried it again after the .pck file issue was fixed, game started freezing at the 4 minute mark, and outright crashed after I jumped from lvl 20~ to lvl 40 at the 5 minute mark (screenshot below)
The lag spikes seem to be randomly happen after a certain point, I can't say for sure; but the EXP sfx kept playing when the lag happened; so I assume a tomato-exp-orb is related somehow?
I'm pretty sure it's that the enemy explosion on death is "killing" the same enemy multiple times and dropping exp for all those kills even though it should only happen once. I'll try to have a fix for it