As Chris hath stated, I am also only here to critique you to help you improve. No offense is carried towards the creators.
Egyptian Escapade Ver.3.0: First off, I have to say, this plot here is very very well made. I like it a bunch. However, considering that thos is version 3.0 and two other versions of the same ride are on the site (only varying a slight bit) bugs me a bit. Something I really dislike about this is the endless plains of grass around it. It would be better to have various terrain colours and hills to the area to make it look less flat. That little mountain thing in the top corner is a prime example of what you would need, although, making it look more like a hill rather than a jagged block would help slightly. As well as the repetition of those flowers (however, I feel it adds to it somewhat). This is me being particular, but, I would have also liked to see some more variation in walls and buildings. Add textures to the wall to make them less dull and boring and add more vibrance to it. This may only be a nitpick as this ride still looks dang good the way it is. What stands out to me most is not the coaster per say, but the intricacies of the surrounding areas/buildings/places. It is so elaborate, yet simple...but so elaborate. I like the amount of creativity here. Even though it is an egyptian theme, and no egyptian theming is really there, you nailed the look of a desert-ish area.
While this is not going to be my vote, I do have to say, it is very well deserved a good feature.
Dynamite: Compared to your POV-less, frankly unthemed, and unfinished last entry, this one is BY FAR a step ahead of that. This ride has a POV, and is themed, and close enough to finished. My issues really rely on how unrealisticly long this ride is. This ride has many flaws I see realisticly based. Firstly, there is way too much track. Way too many launches, and simply too long. There's little theming, and it hardly has a station (usually where the most theming would occur), plus, the once again, besides the mountain, there is endless green. Flat, uncultered terrain. While it has trees every now and again, that simply is not enough to hide the endless greens. The ride is incredibly smooth, and looks fun to ride, all except for where it is upside down and is stagnant there for a good five seconds. (Too long in my honest opinion).
Once again, this is a huge step from what your last entry is. This one still has flaws, and you may have to redraw a plan for a next coaster to be released. I like for some coasters to go wild (particularly unrealistically) however, this one steps the line for me. I would sit down and pour hours into building, theming, and landscaping your next ride, as well as trying to make it more realistic. Once again, this ride is a big step ahead, but it is not my pick for this round. You best keep trying at it, though!
Prowler: This is very much to me, the most incomplete entry. That's unfortunate though, because it very well could be a first entry. Which is why I need to critique this entry so that the creator can get better.
To have a good entry, your ride needs to have theming, custom supports (depending on the game), actual terrain and hills (so that is not plain and dull with nothing to look at), as well as landscaping, or foliating. (Having treesand bushes in select places, not too much, and not too little). You have a lot of trees, that is for sure, but there is none anywhere in the ride limits, and it looks as if every plot of land outside this coaster is full of trees. Plus, there is endless green (once again) in the backround. You may be a beginner, but you need to actually sit down and have a theme to your ride. Simply, try your best next time.
Gangplank: I adored the RCT2 version of the ride, and then you come out with this, and absolutely astonish me, and completely master the game. There is nothing I can say about this ride. It is in EVERY way completed and a great deal better than your RCT2 version. Unlike our first Planet Coaster entry ever, this one is completed, and done such an expertise manner, that I have no choice but to vote for it. Very very very swell job, and this deserves the spot as possibly the first Planet Coaster win on Build It!
To everyone in the round, good luck, and my words were spoken to help you get better, not to bring you down. I'm sorry if I sound harsh, but there isn't much I can do about that.
Resuming regularly scheduled programming!