Melony

One day in the future, evil aliens will occupy your territory, and you will play a mechanical warrior to fight the aliens! "melony" is a casual horizontal shooting game. The mechanical warrior can use 2 different weapons-penetrating bullets and powerful bullets. Penetrating bullets can pierce the enemy and cause damage to multiple enemies, but the damage is very low. Strong bullets can cause a lot of damage to a single enemy. How to use these weapons depends on the player's personal strategy. Whenever the number of kills reaches a certain level, the CG in the album can be unlocked.
summary by MetaCritic