Build a volcanic fortress within a souls budget, then hold its heart through three deterministic missions as walls delay, lava slows, spikes shred and wraiths strike at range. The same editor as Infernal Forge; the combat runs on a fixed step, so a layout always plays out the same way.
Build first, then Launch. Restore checkpoint returns the fortress to its pre-battle state.
GameBefore you run it: can save files to your device.