Happy that you liked it and I totally agree with you! I think that I will continue with the more frustrating route to be honest and expand on that. Because yeah, the normal style is a bit more enjoyable and relaxing, but I feel that it would get boring after a bit and there isn't much that I feel I can expand on while keeping it interesting and fresh. But with the spike parts and similar things like that, I can add so much variety to levels and enemies.
I am planning to check out all the games when the rating begins, so I am looking forward to test your game too!