Incremental Spawning part 2

- At 10000 points, logs will spawn. Effect: It's actually easier to jump
over them compared to at the beginning.
- At 15000 points, the gun and invincibility powerups will spawn.
- At 20000 points, the ramp will spawn.
- At 25000 points, the sword powerup will spawn.
- At 30000 points, the Polar Bear will spawn.
- At 35000 points, the Magnet powerup will spawn.