Penetrator (Rido Games) Normal 2171100pts

5-minute caravan shmup from the Japanese developer Rido Games (who also goes by Rido Kain).
All of Rido Kain's games can be freely downloaded here: ridogames.web.f...
This game has a speed change mechanic that allows you to switch between 3 speed levels, as well as a shot direction change mechanic: press or hold the dedicated button while moving to aim at the direction you're moving at.
There's a power/HP system where your firepower increases when collecting [P] items and decreases when getting hit by an enemy or a bullet. [P] items are dropped by each destroyed red-colored ground object. You have three different levels of power, and if you take damage at your first power level, you lose a life. Taking damage or taking a [P] item makes your ship invincible for 1.5 seconds. The third power level is way more effective than the two lower ones, so you better not get hit or at least have a power item nearby to gain the lost power back if you did get hit.
Yellow ground items drop medals that yield 1000 points. Secret ground items can be unveiled and destroyed with your ship's weapon for a bonus of respectively 200, 500, 1000, 2000, 5000, 10000, 20000, and up to 50000 points.
You get a first extend when your score hits 100000pts, then you get one for each 300000pts obtained since the first extend (100000pts, 400000pts, 700000pts, 1000000pts, and so on).
When the 5-minute timer reaches zero, the game ends without any bonus. If you get to destroy the boss, you get 1000 points for each remaining second and 10000 points for each remaining life.
There is an easy mode that removes the 5-minute time limit and makes non-boss enemies unable to shoot, but decreases the score earned from destroying some enemies and nullifies the score earned from destroying the midboss' destructible bullets, therefore making the action of milking it completely uneffective scoring-wise.

[@PokeDigiFighter11013]

I would love to get my hands on the music of this game.