Megadev effects

Effects add feedback to the game's existing mechanics and art direction. Adapt these techniques to the user's brief; the Lab's lantern, weather, colors, sound and controls are illustrative.

• Read Pools and simulation for finite lifetimes, deterministic timing, burst admission, pause and decorative degradation.
• Read Rendering and performance for resident tiles, SAT/scanline budgets, presentation-only shake and one VBlank publisher.
• Read Validation for behavior tests, original-68000 execution, ARM64/AMD64 comparison, regional checks and measurement limits.

Use ewrogers/megadev:latest and inspect the selected image's source. Megadev exposes VDP and BIOS facilities; this skill's fx_* functions are application code, not a particle engine supplied by the SDK. Do not introduce SGDK's sprite, DMA queue, resource compiler or task APIs as Megadev calls.

Essential choices: