Hello! I'm here to give you some feedback so that you can improve your parkour builds! (Note, I'm just a regular player)
Parkour
Your parkour course lacks lots of things such as variation which has an huge impact on your parkour. Try to use different kind of blocks, such as iron bars, vines, beds, soul sand and many more to make it more interesting and varied! Nevertheless, the difficulty for this parkour is alright. I suggest to check out /warp beta where you can see how players are building parkour courses with different blocks.
Build
You don't have any structure to your parkour, it is just plain bedrock, even though your title is about the block bedrock but you can add something to it. You could build a creature out of bedrock and add some details to it in order to make your parkour course look nice and enjoyable. As I mentioned, If you really need inspiration try to check out /warp beta to get a better look how parkour course are build nowadays.
Theme
There is no set theme for this map, maybe bedrock, however you need to add more to it. Is it a creature? Structure? Item? Tool? Character? etc. Coming up with a unique theme is great start for a parkour course.
Tips
+ I recommend to you /warp beta to get inspired before building a parkour
+ Ask for feedback in game
+ Try out different types of blocks
+ Come up with a theme before building your parkour
I truly hope you can improve your builds for your future parkour courses!