operation Thunderstrike

Here’s a revised version of your game description:

"This demo showcases Operation Thunderstrike, an action-packed shoot 'em up (shmup) inspired by classics like Metal Slug, Heavy Weapon, and Silkworm. Choose between controlling a tank or helicopter and engage in fast-paced combat. Collect upgrades along the way to boost your firepower and face the level’s final boss! Have feedback or thoughts on the game? Visit the developer’s Facebook or itch.io page using the links provided. Enjoy the explosive action!"

(Word count: ~100)

This version keeps the original meaning while improving flow and conciseness. Let me know if you'd like any refinements!