It could go a lot further. Questions to think about:
Can the character be upgraded?
Is it worth adding checkpoints?
Is there a mission?
What's the point of the diamonds?
@IoneDecep, you just need to get the order right. *SPOILER ALERT* go right > rest against platform, press shift > go left, jump on to yellow platform, press shift > jump onto next platform, press shift > jump left twice, right once, press shift > rest against vertical platform, press shift > jump right to get first 'key', press shift > jump right to get second key > TA DAH!
Thank you for your Feedback, I will try to add some Levels