Let's get excited again in 80's!
This is the calculator invader game.
Get the highest score with destroying UFOs!!

Aim and Fire!
Change your number with "AIM" to match one of the advencing invaders and UFO spaceships, then press "FIRE" to destroy the enemy immediately!

+Normal Mode
6 levels, 9 stages each.
Lv2. - The pop up position of the invaders is shifted towards your defense line.
From Lv3 - When you shoot a UFO, a robot “GORT” will appear on the same position as the UFO. Destroy both of them, and you will get over 400 pts!!
From Lv5 - The order of “UFO” and “GORT” in your numbers are swapped.

+Full Nine Mode
The speed of invasion is always the same as in stage 9!!
2 levels, 9 stages each.
Lv2 - The invaders will appear at closer position.
How many stages can you clear!?

+Classic Mode
This mode is within the rules for the classic Number Invader.
2 levels, 9stages each.
Lv2 - The pop-up position of the invaders is getting closer.

*The calculator is just an extra function.

source : itunes.apple.com