Yo! You have very nicely designed levels. The last one was quite challenging 😆. Also the simplicity of the core gameplay mechanics reminded me of Bees and Spikes.
I feel the collision checks are a bit too harsh on the player though. I can imagine people rage quitting if you keep working on this and add more level 😂.
The collision checking that you've got seems to work perfectly. But the problem is how easy it is to accidently touch the wrong block and die. In most of the good platformer games, a lot of special code is added to avoid such things. Here is a short video that covers some of the most common techniques that can make the platforming controls a lot more fun:
The GDC talk mentioned in that video is also quite good detailed.
