Patch 1.0.5: Performance Improvements, Option to Hide Enemy Bodies

Level 6 has been nerfed. If it’s still too challenging for you, try experimenting with different ability cards, meta upgrades, and play styles. It’s difficult but definitely beatable.
Reduced the number of arachnids summoned by other arachnids. But you probably won’t notice much difference.
Added two key shortcuts for the shop: now, double-clicking the left mouse button buys the hovered ability card, and right-clicking a card locks it.
Added an option in the settings to enable/disable dead bodies of enemies. If you're experiencing performance issues, try turning this off. It's on by default.
Made some minor changes that should also improve performance.