How in the ♥♥♥♥ do I access the green planet-looking bonus level? I've seemingly completed every optional thing available

(Now that I know this game is in a compilation with Toree 3D, Toree 2, Regina and Mac, and I'm not sure if the Kiwi 64 achievement means that game is in Macbat 64 but just in case, I'd like to know about them as well. I have the same questions for all of them.) 1. Is there any promotional or permanently missable content? 2. What platform exclusive features are there and is there a reason to beat Time Attack besides achievements? 3. Are there any bonuses for possessing save data from a different game? (Like...

I love these little games that the developer creates :) My only small complaint (at least for just the PC version) is that there is no option to quit/exit the game after you're done, so i had to use more forceful options to do it, nothing too bad though. Maybe i'm overlooking, maybe it's just a beginner mistake for the developer, i'm just putting this out here for feedback to think about it for any future projects, so no offense ;)...

What about achievements? Trading cards? Steam Cloud? The game looks great so far and would be even better with those features.

Do the secret areas serve any purpose, or are they just easter eggs? I know the entrances are references to the Stop & Swap eggs, many of which were originally collected by using cheats to jump out of bounds. I'm also aware that one is based on Terranigma's "Underworld" map. One is the intro cutscene's map. The other 2 I found are likely references/in-jokes I don't quite get. ...