For your maps in the future, I think you should add a proper theme and make it a little bit more detailed. As you said it's your first map and just keep on going on making maps and you will get better. For your first map, it's quite cool.
I'm sorry but I'm rejecting this map as it isn't very attractive and we have other maps that look similar, there are many cheats on the parkour too. The parkoru is slightly confusing as the checkpoints are behind the next part of each parkour? Hope to see more parkours in the future though