Saucer Fall

Watch out for beamers: they lift your towers into the sky. Shoot them down to get your towers back.
A short tutorial teaches the basics while you play, and you can skip it.
Every boss changes the island: new entrances open and the path is rebuilt, so the plan that worked before may not work anymore.
What's inside:
- 3 islands (Meadow, Frost, Ember), 20 waves each, with a boss every 5 waves
- 10 towers: Cannon, Ballista, Turret, Mortar, Frost, Tesla, Missile, Beacon, Gold Mine and Laser
- Merge towers up to 5 tiers
- 37 upgrade cards, including 8 evolution cards that change how a tower fights
- 4 special powers: Orbital Strike, Stasis Field, Overcharge and Repair Drones
- Permanent upgrades with gems, chests and blueprints for tower mastery: you keep growing even when you lose
- Lost a wave? Retry from the start of that wave
- Endless mode after wave 20, 10 threat levels, and a daily challenge with a new rule every day
- English and Japanese
- Progress is saved automatically in your browser

Yes. You can merge towers into higher tiers, choose upgrade cards after each wave, and unlock permanent improvements with gems, chests, and blueprints.

Yes. The game includes multiple islands, towers, upgrade cards, evolution cards, special powers, threat levels, and an Endless mode that becomes available after wave 20.