Just one comment... As for the first game, the whole idea of the Ponziani Opening (1. e4 e5 2. Nf3 Nc6 3. c3) is to get a pawn duo in the center:
3...d6?! 4. d4 exd4 5. cxd4, or
3...d6?! 4. d4 exd4 5. Nxd4 Nxd4 6. cxd4 (not 6. Qxd4).
If you put your queen in the center instead, it is likely to get chased off, which will cost you moves in retreating the queen.
Your third game is the only one worth analyzing.
5. d5 was pointless, develop a piece instead.
9. ng5 was pointless, develop a piece instead.
15. instead of playing g4, it was probably worthwhile putting both your rooks on the d and e files. you have a space advantage in the centre. also h4-h5-hxg6 would have been better than g4. g4 just weakened all the light squares around your king and it doesn't lead to any open files on the kingside, unlike h4-h5-hxg6. also weak light squares around your king is bad news when he still has his light squared bishop and it is on b7 staring at your king.
24. obviously nxc6 was a blunder
also, in general, allowing your light squared bishop to sit on b3 and stare at a wall of pawns is very bad, and trying to activate it with c3->bc2 should be a priority. c3 also bluntens blacks dark squared bishop and holds d4 so it serves a dual purpose.
Three back-to-back games. Looking for tips on improving my game. I'm a pretty casual player, and a low-ranked one at that. Openings, counter attacks, any and all advice is appreciated. First game, I'm white. Second, I'm black. Third, I'm white.
Second game.