Tips to Strategy
Save up for +1 projectile per weapon on power up / +gold as your first upgrades.
Add +exp when you can and 1x 0.1 regen hp.
Unlock all the characters you can, especially +1 projectile and bones (which is +3 projectiles at level 30).
the most important upgrades early game are anything that provides a bounce back to enemies + aoe.
You are stuck to the RNG gods but to survive the early rushes against you you need both aoe and knockback.
As the levels go on prioritise finishing off weapons to level 8 (which requires the passive equipment to match so they can be upgraded fully).
The upgraded versions do rediculous damage/knockback/aoe that it changes the game completely.
Try to get +range/dmg for passive, and consider cooldown reduction.
Pay attention to ‘boss’ style enemies that appear in the wave (the shiny bat, any larger single version of another monster, the green lizard guy in library, mindflayer in library, the large flower lady in garden etc) and focus your fire on them as best you can while keeping some distance as they move in on you. Not paying attention to them is the fastest death as they will walk up and drain your health super fast.
The bosses usually drop chests. Pick them up ASAP as they contain upgrades for you (upgrades which can exceed the max amount of passive items you can normally have)
Watch out for bat waves on garden level as they ‘push’ more durable enemies into your space which can end your run if you don’t have the damage/knockback to repel them fast enough
You want to walk around to unearth food items from the candles and try to leave them if you don’t need them until you do.
Try to farm the gem collector item to help out faster leveling by scooping up all the gems you missed on a 3 screen radius?
Try to expand your collector to match your aoe so you have an easier time leveling up.
You will die at 30mins in, that’s intended. You still get bonus gold for completing the stage as this is the way to finish the map. (you can delay this slightly with the lance that freezes enemies, but you cannot kill what stalks you from 30mins onwards so its a losing battle)
Some weapons are better than others depending on what stage of the fight you are.
Try to get garlic early on if possible for aoe (its damage is super terrible for late game but it helps you get to late game where things like the upgraded bible can clear maps if you can survive long enough to upgrade it there).