Tip: A common level trope to avoid is "item babysitting". This involves forcing the player to carry P-Switches, springboards, or other items all around the level. Usually, this doesn't end up being very fun or engaging, so use another level gimmick if you can.
You are somewhat good at SMW hacking. You can make decent vanilla hacks, but you lack at experience with chocolate hacks. Your hacks are OK or good vanilla hacks that may have flaws like minor cut-off, but are not bad overall.