Speed Level - A level I made in 4 hours

[.]

It has been almost three years since I stop making levels.
I felt bored today and decided to make a level in 4 hours.
I think most rooms are not too difficult but the later rooms are quite challenging.

Map:


My other levels:
Maths Zone: http://distractionware.com/forum/index.php?topic=1699.0
Touhou x VVVVVV: Dimension Gensokyo - http://distractionware.com/forum/index.php?topic=1390.0
Difficulty Spike - http://distractionware.com/forum/index.php?topic=1507.0
Fragments - http://distractionware.com/forum/index.php?topic=1328.0
Stairs - http://distractionware.com/forum/index.php?topic=1410.0
If you are interested, you can try these too.

Although this seems a short time, I have tried my best to avoid bugs or bad level design.
That said, please give me some suggestions and point out bugs in case you face any.

EDIT: I'm removing all my levels after receiving confirmation that I'm a poor level maker. If you really want to go through such a mess, I still have them backed up and I would reply to you maybe 20 years later.

[Ally 🌠]

Welcome back!~
This looks kinda fun, I'll probably try it later.

[Verisnin]

Nice Job Pretty Difficult I had to go invincimode to beat it

[Gawne]

In the room Triplets, the jump on the bottom right of the screen is a lot harder than it needs to be, please nerf it. Aside from that, it's an okay level. However, the difficulty curve us utter garbage, it goes from stupidly easy rooms to crazy difficult rooms back to back. I mean I would've liked a more consistent difficulty curve but then again the level was made in four hours so I can't really complain. Overall, the level is alright; no good nor bad.