Some very cool ideas
I think the fire on the wheels is cool, but it is very hard to make fire look real - try smudging and erasing it a bit more
I think you should move your cars slightly higher up ^ on the background,
If you look at the angle of the ground, and compare it with the angle of the cars, it doesn't quite match
Keep it up though
Remember to keep looking at real cars and doing real drawing practice too - these will all help
DLACZEGO TO MA BYĆ REALISTYCZNE?JAK MOJA FANTAZJA W TYM PROJEKCIE BYŁA TAK BY TEN PROJEKT NIE BYŁ TAKI JAK INNE I DZIĘKUJE ZA TO ŻE MI POZWOLIŁEŚ NAPISAĆ PO POLSKU BARDZO DZIĘKUJE ATC