Better than Ghost'n'Goblins but there are simillar problem: bad level-design.
For example, level 3 - too much earth on right side but after that level is empty. Try to use double-steel wall - Leon can't teleport through that wall. After that - cave background, some different earth blocks. So you fill empty zone, and players can't reach that.
And "fade in" when level ends - if you use that, finish level immediatly.
BTW, some ideas looks interesting.

cancer

Surprisingly, I only realized the similar name now.

so this has nothing to do with SCP containment breach?

Thanks for the feedback man! I love your levels too.

Loved it dude!