Looking for an old DOS Freeware/Shareware game (Mustang?).

[BareKnuckleRoo]

I've tried searching various sites to no avail, but I'm looking for an old DOS game I believe was called 'Mustang' (I could be mistaken on the name) as in the P-51 Mustang plane. Not sure if it was a port of a game, but it seems doubtful as I've tried looking to see if perhaps it was a DOS port of a C64 or arcade game with no luck.

The game was a freeware or shareware top-down vertical shmup with basic graphics (I remember it being EGA), where you fought various planes as they appeared at the top of the screen. There was no background landscape/scrolling, just a blue screen if I recall, and the enemy formations consisted of either a basic type of small planes or the occasional larger bombers (bore a resemblance to a green B-17 Flying Fortress I think) that took several hits to destroy.

Special weapons would occasionally show up that included a wide black pellet spreadshot and a distinctive pink & black homing shot that would fly around the screen and seek out enemies. I can't remember if special weapons ran out based on a timer or if they had a certain number of uses each time you picked one up. I vaguely remember a powerup allowing you to ram into enemies if you liked, although it could be the game simply gave you a lifebar.

I remember the controls being atrocious as if you pressed an arrow on the numpad you'd keep flying in that direction until you pressed that arrow again. Shoot I believe was done by tapping the spacebar repeatedly. Game speed needed something like MoSlo too (last time I played it was years ago on a Pentium if I recall, game was way too fast without it). The game itself I remember being amusing, but not great by any means. Still I'm interested in playing it again for the nostalgia factor.

Thanks in advance for the help.

edit: it's a game made in Borland Pascal, details here:

https://www.vogons.org/viewtopic.php?t=30016