Glitchy and lots of lag (lol)

This game is very laggy, glitchy, and crashes a lot. Its probably because I have an outdated device but still, you guys cant fix that? Also theres this one bug that sometimes happens when I go to the missions, instead of the play button under the stadiums, it says "lukossa" and asks for 20 keys (even though I already bought the stadium) So please make the game more smooth.

Benjamin243 about Drive Ahead! - Fun Car Battles, v1.31