Rollercoaster Tempos Are Not My Thing
The abrupt change in tempo didn't feel right; I would suggest a build to a faster tempo for the future, kind of like how you did it around 01:12, except in reverse of course. And be careful to use this method sparingly; several changes in tempo can leave the listener feeling dizzy.
You got the melody pretty dead on, but the song also ended abruptly. I'd say the most important thing to work on would be fluidity in your arrangments.
Don't give up! Show me the best you got ;)