Thanks for your well thought out comment! I can't tell but I hope you enjoyed playing ;p
I agree there's definitely a curve you could plot for a given set of mechanics that you could use to tweak when the game is intense vs those moments of rest.
I really just made the mana regeneration about 1/2 or maybe even 1/4 what it needed to be, it was intended to still allow you to rebound but make firing a bolt something you needed charge for and so think about before using constantly. Periods of waiting for the mana to charge should have been shorter but I hoped it would give moments of intensity as you're hoping another spider-person doesn't drop near you.
What I would say is one of the problems with devving for a game jam is that you play your game over and over again as you go. You eventually get 'good' at your own game mechanics and when it comes to tweaking you can accidentally make it harder for new players as you're actually tweaking it to give YOU a challenge again. This is especially true of a Roguelike, as there's often a mechanic that is intended to be learned by the player for them to practice and improve on. Post-voting I might tweak it so the starting point is easier, as well as increasing the mana regen.