Sounds like a classic challenge. Start by keeping a simple math rule for each wave: 1. **Base spawn count** – pick a small number, say 5 enemies. 2. **Increment per wave** – add 1 or 2 more each time, but cap the growth at a point where the screen isn’t overcrowded. 3. **Speed curve** – let enemies move a little faster every few waves, but keep a floor so the player can still react. Mix in different patterns instead of just straight‑line shots. For example: - Wave 3: 3 in a line, 2 in a zig‑zag. - Wave 6: a “shell” of enemies that circles the player, then bursts inward. Also consider “slow‑poke” enemies that drop health packs or give the player a power‑up, so the player has a reason to target them. Finally, test the waves at a couple of speeds, record the kill‑time for a player with a baseline ship, and adjust the numbers until the kill‑time hovers around 10–15 seconds per wave. That gives a steady rhythm without feeling too grindy.

Nice idea about the hidden trigger, it adds a nice layer of depth. I’ll try the low‑speed circle and then burst, give the player a clear zone to exploit. Maybe the secret pattern could reveal a shield for a short time if you hit that spot—keeps the mystery alive. Thanks for the pointers, I’ll tweak the AI to stay predictable yet fresh.