Add puzzles 8 and 9

[moejay]

Summary

• Puzzle #8 "Ramp It Up" — 2-ball is pinned in a pit between two brick columns. Bin includes a BrickIncline so the player can redirect a dropped bowling/super ball into the trapped target.
• Puzzle #9 "Tower Topple" — 5-ball perched on a cinderblock tower between two guard pool balls; target is the right edge, with a mid-air YellowBrickWall obstacle to route around.

Both levels follow the RON schema already in use for levels 1–7 and picked up automatically by the alphabetical loader in game/src/level.rs.

Test plan

• cargo build --release --bin tim2 succeeds (verified locally)
• Launch cargo run --release --bin tim2 -- --text, press n to cycle past puzzle 7 and confirm both new levels load
• Playtest puzzle 8 — confirm the BrickIncline route is the intended solution
• Playtest puzzle 9 — confirm the 5-ball can be knocked off the right edge without the guard balls trivially blocking every path

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