Job of Protecting Jewel

I'm currently challenging myself with "Game a Week".

For the 21th week, I created a game where you defeat a massive number of enemies.

My jewel is being targeted.

I’ve prepared a special machine, so hop on and take down the enemies.

By earning points, you can upgrade your machine.

However, make sure the gem is never destroyed.

When you collect a certain number of points, an upgrade window for the machine will appear.

You can choose one upgrade from the following six options:

• Machine speed
• Reload speed
• Number of bullets fired
• Bullet speed
• Bullet power
• Bullet duration

Controls: 

Move up, down, left, and right using the arrow keys or AWSD keys. 

Use the spacebar or left-click to fire bullets and attack.

Credits:

Character  images (released into the public domain):

https://kenney.nl/assets/platformer-pack-redux

Player and effect images (released into the public domain):

https://kenney.nl/assets/alien-ufo-pack

BGM "Action Man" (released into the public domain):

https://opengameart.org/content/action-man

Sound effects created using the following site:

https://sfbgames.itch.io/chiptone