Combat feel

• LV1 / LV2 fire faster (less “one shot per second” at base level).
• Clock lasts 12s and slightly boosts your fire rate while enemies are frozen.
• Heavy tanks capped per stage (4 in 1P, 5 in 2P).
• Fewer armored normal / fast / sniper variants (N2 / F2 / S2 hard caps + lower weights).

Maps — handcrafted

• Stages 33 / 47 / 49 (map_17 / 24 / 25): clearer alleys, short iron covers, less brick-sea feel; HQ brick ring left intact.

Maps — procedural (random stages)

• New block-city layout: left / mid / right corridors + 3×3 street modules (alley fight focus).
• Bricks use clean half-edge pieces (easier to dig, less messy).
• Mid-lane steel gate in front of the base; the tile next to HQ is half-steel so you can still slip past along the base edge.
• Side-lane brick gates slow straight edge rushes (breakable).
• Enemy spawn exits cleared so tanks aren’t walled in at spawn.
• Late stages get more crossroads / gates / cover modules; fill density stops climbing past mid-late (no endless brick walls).

Already in (prior balance)

• Death drops one level (not hard reset to LV1).
• Softer late AI / enemy mix; smarter power-up weights.